diff --git a/mz/mz-tests.ts b/mz/mz-tests.ts
new file mode 100644
index 000000000..abcff6ac6
--- /dev/null
+++ b/mz/mz-tests.ts
@@ -0,0 +1,241 @@
+/// <reference path="../mocha/mocha.d.ts" />
+/// <reference path="../node/node.d.ts" />
+/// <reference path="mz.d.ts" />
+
+
+import assert = require('assert')
+import fs = require('mz/fs')
+
+
+describe('fs', function () {
+
+  it('.stat()', function (done) {
+    fs.stat(__filename).then(function (stats) {
+      assert.equal(typeof stats.size, 'number')
+      done()
+    }).catch(done)
+  })
+
+  it('.statSync()', function () {
+    var stats = fs.statSync(__filename)
+    assert.equal(typeof stats.size, 'number')
+  })
+
+  it('.exists()', function (done) {
+    fs.exists(__filename).then(function (exists) {
+      assert(exists)
+      done()
+    }).catch(done)
+  })
+
+  it('.existsSync()', function () {
+    var exists = fs.existsSync(__filename)
+    assert(exists)
+  })
+
+  describe('callback support', function () {
+    it('.stat()', function (done) {
+      fs.stat(__filename, function (err, stats) {
+        assert(!err)
+        assert.equal(typeof stats.size, 'number')
+        done()
+      })
+    })
+
+    it('.exists()', function (done) {
+      fs.exists(__filename, function (err, exists) {
+        assert(!err)
+        assert(exists)
+        done()
+      })
+    })
+  })
+})
+
+import cp = require('mz/child_process')
+describe('child_process', function () {
+
+
+  it('.exec().then()', function (done) {
+    cp.exec('node --version').then(function (params) {
+      assert.equal(params[0].toString('utf8')[0], 'v')
+      done()
+    })
+  })
+
+  it('.exec().catch()', function (done) {
+    cp.exec('lkajsdfkljalskdfjalsdf').catch(function (err) {
+      done()
+    })
+  })
+
+  describe('callback support', function () {
+    it('.exec() success', function (done) {
+      cp.exec('node --version', function (err, stdout) {
+        assert.equal(stdout.toString('utf8')[0], 'v')
+        done()
+      })
+    })
+
+    it('.exec() err', function (done) {
+      cp.exec('lkajsdfkljalskdfjalsdf', function (err) {
+        assert(err)
+        done()
+      })
+    })
+  })
+})
+
+import crypto = require('mz/crypto')
+
+describe('crypto', function () {
+
+  it('.randomBytes().then()', function (done) {
+    crypto.randomBytes(8).then(function (buf) {
+      assert.equal(buf.length, 8)
+      done()
+    })
+  })
+
+  describe('callback support', function () {
+    it('.randomBytes()', function (done) {
+      crypto.randomBytes(8, function (err, buf) {
+        assert(!err)
+        assert.equal(buf.length, 8)
+        done()
+      })
+    })
+  })
+})
+
+import stream = require('stream')
+import readline = require('mz/readline')
+
+describe('readline', function () {
+
+
+  it('.question().then()', function (done) {
+    var input = new stream.PassThrough()
+    var output = new stream.PassThrough()
+    var rl = readline.createInterface({ input: input, output: output })
+
+    rl.question('a').then(function (answer) {
+      assert.equal(answer, 'b')
+      done()
+    })
+
+    assert.equal(output.read(), 'a')
+    input.write('b\n')
+  })
+
+  it('completer support', function (done) {
+    function completer (line:string) {
+      assert.equal(line, 'b')
+      return Promise.resolve([['bTESTSTRING'], line])
+    }
+
+    var input = new stream.PassThrough()
+    var output = new stream.PassThrough()
+    var bufferedOutput = ''
+    var rl = readline.createInterface( input, output, <readline.Completer>completer, true )
+
+    rl.question('a').then(function (answer: string) {
+      assert.equal(answer, 'bTESTSTRING')
+      done()
+    })
+
+    function onOutputData (data: Buffer | String) {
+      bufferedOutput += data.toString()
+
+      if (bufferedOutput.match(/TESTSTRING/)) {
+        input.write('\n')
+        output.removeListener('data', onOutputData)
+      }
+    }
+
+    output.on('data', onOutputData)
+    input.write('b\t')
+  })
+
+  describe('callback support', function () {
+    it('.question()', function (done) {
+      var input = new stream.PassThrough()
+      var output = new stream.PassThrough()
+      var rl = readline.createInterface({ input: input, output: output })
+
+      rl.question('a', function (answer) {
+        assert.equal(answer, 'b')
+        done()
+      })
+
+      assert.equal(output.read(), 'a')
+      input.write('b\n')
+    })
+
+    it('completer support sync', function (done) {
+      function completer (line: string) {
+        assert.equal(line, 'b')
+        return <[string[], string]>[['bTESTSTRING'], line]
+      }
+
+      var input = new stream.PassThrough()
+      var output = new stream.PassThrough()
+      var rl = readline.createInterface(input, output, <readline.Completer>completer, true)
+
+      rl.question('a').then(function (answer) {
+        assert.ok(output.read().toString().match(/TESTSTRING/))
+        done()
+      })
+
+      input.write('b\t\n')
+    })
+
+    it('completer support async', function (done) {
+      function completer (line: string, cb: (err: any, result: [string[], string]) => void) {
+        assert.equal(line, 'b')
+        cb(null, [['bTESTSTRING'], line])
+      }
+
+      var input = new stream.PassThrough()
+      var output = new stream.PassThrough()
+      var rl = readline.createInterface(input, output, <readline.Completer>completer, true )
+
+      rl.question('a').then(function (answer) {
+        assert.ok(output.read().toString().match(/TESTSTRING/))
+        done()
+      })
+
+      input.write('b\t\n')
+    })
+  })
+})
+
+import zlib = require('mz/zlib')
+
+describe('zlib', function () {
+
+  it('.gzip().then().gunzip()', function (done) {
+    var buf = new Buffer("lol", 'utf-8');
+    zlib.gzip(buf).then(function (res) {
+      return zlib.gunzip(res)
+    }).then(function (string) {
+      assert.equal(string, 'lol')
+      done()
+    })
+  })
+
+  describe('callback support', function () {
+    it('.gzip() and .gunzip()', function (done) {
+    var buf = new Buffer("lol", 'utf-8');
+      zlib.gzip(buf, function (err, res) {
+        assert(!err)
+        assert(Buffer.isBuffer(res))
+        zlib.gunzip(res, function (err, string) {
+          assert(!err)
+          assert.equal(string, 'lol')
+          done()
+        })
+      })
+    })
+  })
+})
diff --git a/mz/mz.d.ts b/mz/mz.d.ts
new file mode 100644
index 000000000..8c3206c71
--- /dev/null
+++ b/mz/mz.d.ts
@@ -0,0 +1,798 @@
+// Type definitions for mz
+// Project: https://github.com/normalize/mz
+// Definitions by: Thomas Hickman <https://github.com/ThomasHickman>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+// Modified from the node.js definitions https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/node/node.d.ts
+
+/// <reference path="../bluebird/bluebird.d.ts" />
+/// <reference path="../node/node.d.ts" />
+
+
+declare module "mz/fs" {
+    import * as stream from "stream";
+    import * as events from "events";
+
+    interface Stats {
+        isFile(): boolean;
+        isDirectory(): boolean;
+        isBlockDevice(): boolean;
+        isCharacterDevice(): boolean;
+        isSymbolicLink(): boolean;
+        isFIFO(): boolean;
+        isSocket(): boolean;
+        dev: number;
+        ino: number;
+        mode: number;
+        nlink: number;
+        uid: number;
+        gid: number;
+        rdev: number;
+        size: number;
+        blksize: number;
+        blocks: number;
+        atime: Date;
+        mtime: Date;
+        ctime: Date;
+        birthtime: Date;
+    }
+
+    interface FSWatcher extends events.EventEmitter {
+        close(): void;
+    }
+
+    export interface ReadStream extends stream.Readable {
+        close(): void;
+    }
+    export interface WriteStream extends stream.Writable {
+        close(): void;
+        bytesWritten: number;
+    }
+
+    /**
+     * Asynchronous rename.
+     * @param oldPath
+     * @param newPath
+     * @param callback No arguments other than a possible exception are given to the completion callback.
+     */
+    export function rename(oldPath: string, newPath: string): Promise<void>;
+
+    /**
+     * Asynchronous rename.
+     * @param oldPath
+     * @param newPath
+     * @param callback No arguments other than a possible exception are given to the completion callback.
+     */
+    export function rename(oldPath: string, newPath: string, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    /**
+     * Synchronous rename
+     * @param oldPath
+     * @param newPath
+     */
+    export function renameSync(oldPath: string, newPath: string): void;
+    export function truncate(path: string, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    export function truncate(path: string, len: number, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    export function truncateSync(path: string, len?: number): void;
+    export function ftruncate(fd: number): Promise<void>;
+    export function ftruncate(fd: number, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    export function ftruncate(fd: number, len: number): Promise<void>;
+    export function ftruncate(fd: number, len: number, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    export function ftruncateSync(fd: number, len?: number): void;
+    export function chown(path: string, uid: number, gid: number): Promise<void>;
+    export function chown(path: string, uid: number, gid: number, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    export function chownSync(path: string, uid: number, gid: number): void;
+    export function fchown(fd: number, uid: number, gid: number): Promise<void>;
+    export function fchown(fd: number, uid: number, gid: number, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    export function fchownSync(fd: number, uid: number, gid: number): void;
+    export function lchown(path: string, uid: number, gid: number): Promise<void>;
+    export function lchown(path: string, uid: number, gid: number, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    export function lchownSync(path: string, uid: number, gid: number): void;
+    export function chmod(path: string, mode: number): Promise<void>;
+    export function chmod(path: string, mode: number, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    export function chmod(path: string, mode: string): Promise<void>;
+    export function chmod(path: string, mode: string, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    export function chmodSync(path: string, mode: number): void;
+    export function chmodSync(path: string, mode: string): void;
+    export function fchmod(fd: number, mode: number): Promise<void>;
+    export function fchmod(fd: number, mode: number, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    export function fchmod(fd: number, mode: string): Promise<void>;
+    export function fchmod(fd: number, mode: string, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    export function fchmodSync(fd: number, mode: number): void;
+    export function fchmodSync(fd: number, mode: string): void;
+    export function lchmod(path: string, mode: number, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    export function lchmod(path: string, mode: string, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    export function lchmodSync(path: string, mode: number): void;
+    export function lchmodSync(path: string, mode: string): void;
+    export function stat(path: string): Promise<Stats>;
+    export function stat(path: string, callback?: (err: NodeJS.ErrnoException, stats: Stats) => any): void;
+    export function lstat(path: string): Promise<Stats>;
+    export function lstat(path: string, callback?: (err: NodeJS.ErrnoException, stats: Stats) => any): void;
+    export function fstat(fd: number): Promise<Stats>;
+    export function fstat(fd: number, callback?: (err: NodeJS.ErrnoException, stats: Stats) => any): void;
+    export function statSync(path: string): Stats;
+    export function lstatSync(path: string): Stats;
+    export function fstatSync(fd: number): Stats;
+    export function link(srcpath: string, dstpath: string): Promise<void>;
+    export function link(srcpath: string, dstpath: string, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    export function linkSync(srcpath: string, dstpath: string): void;
+    export function symlink(srcpath: string, dstpath: string, type?: string): Promise<void>;
+    export function symlink(srcpath: string, dstpath: string, type?: string, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    export function symlinkSync(srcpath: string, dstpath: string, type?: string): void;
+    export function readlink(path: string): Promise<string>;
+    export function readlink(path: string, callback?: (err: NodeJS.ErrnoException, linkString: string) => any): void;
+    export function readlinkSync(path: string): string;
+    export function realpath(path: string): Promise<string>;
+    export function realpath(path: string, callback?: (err: NodeJS.ErrnoException, resolvedPath: string) => any): void;
+    export function realpath(path: string, cache: {[path: string]: string}): Promise<string>;
+    export function realpath(path: string, cache: {[path: string]: string}, callback: (err: NodeJS.ErrnoException, resolvedPath: string) =>any): void;
+    export function realpathSync(path: string, cache?: { [path: string]: string }): string;
+    /*
+     * Asynchronous unlink - deletes the file specified in {path}
+     *
+     * @param path
+     * @param callback No arguments other than a possible exception are given to the completion callback.
+     */
+    export function unlink(path: string): Promise<void>;
+    /*
+     * Asynchronous unlink - deletes the file specified in {path}
+     *
+     * @param path
+     * @param callback No arguments other than a possible exception are given to the completion callback.
+     */
+    export function unlink(path: string, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    /*
+     * Synchronous unlink - deletes the file specified in {path}
+     *
+     * @param path
+     */
+    export function unlinkSync(path: string): void;
+    /*
+     * Asynchronous rmdir - removes the directory specified in {path}
+     *
+     * @param path
+     * @param callback No arguments other than a possible exception are given to the completion callback.
+     */
+    export function rmdir(path: string): Promise<void>;
+    /*
+     * Asynchronous rmdir - removes the directory specified in {path}
+     *
+     * @param path
+     * @param callback No arguments other than a possible exception are given to the completion callback.
+     */
+    export function rmdir(path: string, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    /*
+     * Synchronous rmdir - removes the directory specified in {path}
+     *
+     * @param path
+     */
+    export function rmdirSync(path: string): void;
+    /*
+     * Asynchronous mkdir - creates the directory specified in {path}.  Parameter {mode} defaults to 0777.
+     *
+     * @param path
+     * @param callback No arguments other than a possible exception are given to the completion callback.
+     */
+    export function mkdir(path: string): Promise<void>;
+    /*
+     * Asynchronous mkdir - creates the directory specified in {path}.  Parameter {mode} defaults to 0777.
+     *
+     * @param path
+     * @param callback No arguments other than a possible exception are given to the completion callback.
+     */
+    export function mkdir(path: string, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    /*
+     * Asynchronous mkdir - creates the directory specified in {path}.  Parameter {mode} defaults to 0777.
+     *
+     * @param path
+     * @param mode
+     * @param callback No arguments other than a possible exception are given to the completion callback.
+     */
+    export function mkdir(path: string, mode: number): Promise<void>;
+    /*
+     * Asynchronous mkdir - creates the directory specified in {path}.  Parameter {mode} defaults to 0777.
+     *
+     * @param path
+     * @param mode
+     * @param callback No arguments other than a possible exception are given to the completion callback.
+     */
+    export function mkdir(path: string, mode: number, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    /*
+     * Asynchronous mkdir - creates the directory specified in {path}.  Parameter {mode} defaults to 0777.
+     *
+     * @param path
+     * @param mode
+     * @param callback No arguments other than a possible exception are given to the completion callback.
+     */
+    export function mkdir(path: string, mode: string): Promise<void>;
+    /*
+     * Asynchronous mkdir - creates the directory specified in {path}.  Parameter {mode} defaults to 0777.
+     *
+     * @param path
+     * @param mode
+     * @param callback No arguments other than a possible exception are given to the completion callback.
+     */
+    export function mkdir(path: string, mode: string, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    /*
+     * Synchronous mkdir - creates the directory specified in {path}.  Parameter {mode} defaults to 0777.
+     *
+     * @param path
+     * @param mode
+     * @param callback No arguments other than a possible exception are given to the completion callback.
+     */
+    export function mkdirSync(path: string, mode?: number): void;
+    /*
+     * Synchronous mkdir - creates the directory specified in {path}.  Parameter {mode} defaults to 0777.
+     *
+     * @param path
+     * @param mode
+     * @param callback No arguments other than a possible exception are given to the completion callback.
+     */
+    export function mkdirSync(path: string, mode?: string): void;
+    export function readdir(path: string): Promise<string[]>;
+    export function readdir(path: string, callback?: (err: NodeJS.ErrnoException, files: string[]) => void): void;
+    export function readdirSync(path: string): string[];
+    export function close(fd: number): Promise<void>;
+    export function close(fd: number, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    export function closeSync(fd: number): void;
+    export function open(path: string, flags: string): Promise<number>;
+    export function open(path: string, flags: string, callback?: (err: NodeJS.ErrnoException, fd: number) => any): void;
+    export function open(path: string, flags: string, mode: number): Promise<number>;
+    export function open(path: string, flags: string, mode: number, callback?: (err: NodeJS.ErrnoException, fd: number) => any): void;
+    export function open(path: string, flags: string, mode: string): Promise<number>;
+    export function open(path: string, flags: string, mode: string, callback?: (err: NodeJS.ErrnoException, fd: number) => any): void;
+    export function openSync(path: string, flags: string, mode?: number): number;
+    export function openSync(path: string, flags: string, mode?: string): number;
+    export function utimes(path: string, atime: number, mtime: number): Promise<void>;
+    export function utimes(path: string, atime: number, mtime: number, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    export function utimes(path: string, atime: Date, mtime: Date): Promise<void>;
+    export function utimes(path: string, atime: Date, mtime: Date, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    export function utimesSync(path: string, atime: number, mtime: number): void;
+    export function utimesSync(path: string, atime: Date, mtime: Date): void;
+    export function futimes(fd: number, atime: number, mtime: number): Promise<void>;
+    export function futimes(fd: number, atime: number, mtime: number, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    export function futimes(fd: number, atime: Date, mtime: Date): Promise<void>;
+    export function futimes(fd: number, atime: Date, mtime: Date, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    export function futimesSync(fd: number, atime: number, mtime: number): void;
+    export function futimesSync(fd: number, atime: Date, mtime: Date): void;
+    export function fsync(fd: number): Promise<void>;
+    export function fsync(fd: number, callback?: (err?: NodeJS.ErrnoException) => void): void;
+    export function fsyncSync(fd: number): void;
+    export function write(fd: number, buffer: Buffer, offset: number, length: number, position: number): Promise<[number, Buffer]>;
+    export function write(fd: number, buffer: Buffer, offset: number, length: number, position: number, callback?: (err: NodeJS.ErrnoException, written: number, buffer: Buffer) => void): void;
+    export function write(fd: number, buffer: Buffer, offset: number, length: number): Promise<[number, Buffer]>;
+    export function write(fd: number, buffer: Buffer, offset: number, length: number, callback?: (err: NodeJS.ErrnoException, written: number, buffer: Buffer) => void): void;
+    export function write(fd: number, data: any): Promise<[number, string]>;
+    export function write(fd: number, data: any, callback?: (err: NodeJS.ErrnoException, written: number, str: string) => void): void;
+    export function write(fd: number, data: any, offset: number): Promise<[number, string]>;
+    export function write(fd: number, data: any, offset: number, callback?: (err: NodeJS.ErrnoException, written: number, str: string) => void): void;
+    export function write(fd: number, data: any, offset: number, encoding: string): Promise<[number, string]>;
+    export function write(fd: number, data: any, offset: number, encoding: string, callback?: (err: NodeJS.ErrnoException, written: number, str: string) => void): void;
+    export function writeSync(fd: number, buffer: Buffer, offset: number, length: number, position: number): number;
+    export function read(fd: number, buffer: Buffer, offset: number, length: number, position: number): Promise<[number, Buffer]>;
+    export function read(fd: number, buffer: Buffer, offset: number, length: number, position: number, callback?: (err: NodeJS.ErrnoException, bytesRead: number, buffer: Buffer) => void): void;
+    export function readSync(fd: number, buffer: Buffer, offset: number, length: number, position: number): number;
+    /*
+     * Asynchronous readFile - Asynchronously reads the entire contents of a file.
+     *
+     * @param fileName
+     * @param encoding
+     * @param callback - The callback is passed two arguments (err, data), where data is the contents of the file.
+     */
+    export function readFile(filename: string, encoding: string): Promise<string>;
+    /*
+     * Asynchronous readFile - Asynchronously reads the entire contents of a file.
+     *
+     * @param fileName
+     * @param encoding
+     * @param callback - The callback is passed two arguments (err, data), where data is the contents of the file.
+     */
+    export function readFile(filename: string, encoding: string, callback: (err: NodeJS.ErrnoException, data: string) => void): void;
+    /*
+     * Asynchronous readFile - Asynchronously reads the entire contents of a file.
+     *
+     * @param fileName
+     * @param options An object with optional {encoding} and {flag} properties.  If {encoding} is specified, readFile returns a string; otherwise it returns a Buffer.
+     * @param callback - The callback is passed two arguments (err, data), where data is the contents of the file.
+     */
+    export function readFile(filename: string, options: { encoding: string; flag?: string; }): Promise<string>;
+    /*
+     * Asynchronous readFile - Asynchronously reads the entire contents of a file.
+     *
+     * @param fileName
+     * @param options An object with optional {encoding} and {flag} properties.  If {encoding} is specified, readFile returns a string; otherwise it returns a Buffer.
+     * @param callback - The callback is passed two arguments (err, data), where data is the contents of the file.
+     */
+    export function readFile(filename: string, options: { encoding: string; flag?: string; }, callback: (err: NodeJS.ErrnoException, data: string) => void): void;
+    /*
+     * Asynchronous readFile - Asynchronously reads the entire contents of a file.
+     *
+     * @param fileName
+     * @param options An object with optional {encoding} and {flag} properties.  If {encoding} is specified, readFile returns a string; otherwise it returns a Buffer.
+     * @param callback - The callback is passed two arguments (err, data), where data is the contents of the file.
+     */
+    export function readFile(filename: string, options: { flag?: string; }): Promise<Buffer>;
+    /*
+     * Asynchronous readFile - Asynchronously reads the entire contents of a file.
+     *
+     * @param fileName
+     * @param options An object with optional {encoding} and {flag} properties.  If {encoding} is specified, readFile returns a string; otherwise it returns a Buffer.
+     * @param callback - The callback is passed two arguments (err, data), where data is the contents of the file.
+     */
+    export function readFile(filename: string, options: { flag?: string; }, callback: (err: NodeJS.ErrnoException, data: Buffer) => void): void;
+    /*
+     * Asynchronous readFile - Asynchronously reads the entire contents of a file.
+     *
+     * @param fileName
+     * @param callback - The callback is passed two arguments (err, data), where data is the contents of the file.
+     */
+    export function readFile(filename: string): Promise<Buffer>;
+    /*
+     * Asynchronous readFile - Asynchronously reads the entire contents of a file.
+     *
+     * @param fileName
+     * @param callback - The callback is passed two arguments (err, data), where data is the contents of the file.
+     */
+    export function readFile(filename: string, callback: (err: NodeJS.ErrnoException, data: Buffer) => void): void;
+    /*
+     * Synchronous readFile - Synchronously reads the entire contents of a file.
+     *
+     * @param fileName
+     * @param encoding
+     */
+    export function readFileSync(filename: string, encoding: string): string;
+    /*
+     * Synchronous readFile - Synchronously reads the entire contents of a file.
+     *
+     * @param fileName
+     * @param options An object with optional {encoding} and {flag} properties.  If {encoding} is specified, readFileSync returns a string; otherwise it returns a Buffer.
+     */
+    export function readFileSync(filename: string, options: { encoding: string; flag?: string; }): string;
+    /*
+     * Synchronous readFile - Synchronously reads the entire contents of a file.
+     *
+     * @param fileName
+     * @param options An object with optional {encoding} and {flag} properties.  If {encoding} is specified, readFileSync returns a string; otherwise it returns a Buffer.
+     */
+    export function readFileSync(filename: string, options?: { flag?: string; }): Buffer;
+    export function writeFile(filename: string, data: any): Promise<void>;
+    export function writeFile(filename: string, data: any, callback?: (err: NodeJS.ErrnoException) => void): void;
+    export function writeFile(filename: string, data: any, options: { encoding?: string; mode?: number; flag?: string; }): Promise<void>;
+    export function writeFile(filename: string, data: any, options: { encoding?: string; mode?: number; flag?: string; }, callback?: (err: NodeJS.ErrnoException) => void): void;
+    export function writeFile(filename: string, data: any, options: { encoding?: string; mode?: string; flag?: string; }): Promise<void>;
+    export function writeFile(filename: string, data: any, options: { encoding?: string; mode?: string; flag?: string; }, callback?: (err: NodeJS.ErrnoException) => void): void;
+    export function writeFileSync(filename: string, data: any, options?: { encoding?: string; mode?: number; flag?: string; }): void;
+    export function writeFileSync(filename: string, data: any, options?: { encoding?: string; mode?: string; flag?: string; }): void;
+    export function appendFile(filename: string, data: any, options: { encoding?: string; mode?: number; flag?: string; }): Promise<void>;
+    export function appendFile(filename: string, data: any, options: { encoding?: string; mode?: number; flag?: string; }, callback?: (err: NodeJS.ErrnoException) => void): void;
+    export function appendFile(filename: string, data: any, options: { encoding?: string; mode?: string; flag?: string; }): Promise<void>;
+    export function appendFile(filename: string, data: any, options: { encoding?: string; mode?: string; flag?: string; }, callback?: (err: NodeJS.ErrnoException) => void): void;
+    export function appendFile(filename: string, data: any): Promise<void>;
+    export function appendFile(filename: string, data: any, callback?: (err: NodeJS.ErrnoException) => void): void;
+    export function appendFileSync(filename: string, data: any, options?: { encoding?: string; mode?: number; flag?: string; }): void;
+    export function appendFileSync(filename: string, data: any, options?: { encoding?: string; mode?: string; flag?: string; }): void;
+    export function watchFile(filename: string, listener: (curr: Stats, prev: Stats) => void): void;
+    export function watchFile(filename: string, options: { persistent?: boolean; interval?: number; }, listener: (curr: Stats, prev: Stats) => void): void;
+    export function unwatchFile(filename: string, listener?: (curr: Stats, prev: Stats) => void): void;
+    export function watch(filename: string, listener?: (event: string, filename: string) => any): FSWatcher;
+    export function watch(filename: string, options: { persistent?: boolean; }, listener?: (event: string, filename: string) => any): FSWatcher;
+    export function exists(path: string): Promise<boolean>;
+    export function exists(path: string, callback: (err:any, exists: boolean) => void): void;
+    export function existsSync(path: string): boolean;
+    /** Constant for fs.access(). File is visible to the calling process. */
+    export var F_OK: number;
+    /** Constant for fs.access(). File can be read by the calling process. */
+    export var R_OK: number;
+    /** Constant for fs.access(). File can be written by the calling process. */
+    export var W_OK: number;
+    /** Constant for fs.access(). File can be executed by the calling process. */
+    export var X_OK: number;
+    /** Tests a user's permissions for the file specified by path. */
+    export function access(path: string): Promise<void>;
+    /** Tests a user's permissions for the file specified by path. */
+    export function access(path: string, callback: (err: NodeJS.ErrnoException) => void): void;
+    export function access(path: string, mode: number): Promise<void>;
+    export function access(path: string, mode: number, callback: (err: NodeJS.ErrnoException) => void): void;
+    /** Synchronous version of fs.access. This throws if any accessibility checks fail, and does nothing otherwise. */
+    export function accessSync(path: string, mode ?: number): void;
+    export function createReadStream(path: string, options?: {
+        flags?: string;
+        encoding?: string;
+        fd?: number;
+        mode?: number;
+        autoClose?: boolean;
+    }): ReadStream;
+    export function createWriteStream(path: string, options?: {
+        flags?: string;
+        encoding?: string;
+        fd?: number;
+        mode?: number;
+    }): WriteStream;
+}
+
+declare module "mz/dns" {
+    export function lookup(domain: string, family: number): Promise<[string, number]>;
+    export function lookup(domain: string, family: number, callback: (err: Error, address: string, family: number) =>void ): string;
+    export function lookup(domain: string): Promise<[string, number]>;
+    export function lookup(domain: string, callback: (err: Error, address: string, family: number) =>void ): string;
+    export function resolve(domain: string, rrtype: string): Promise<string[]>;
+    export function resolve(domain: string, rrtype: string, callback: (err: Error, addresses: string[]) =>void ): string[];
+    export function resolve(domain: string): Promise<string[]>;
+    export function resolve(domain: string, callback: (err: Error, addresses: string[]) =>void ): string[];
+    export function resolve4(domain: string): Promise<string[]>;
+    export function resolve4(domain: string, callback: (err: Error, addresses: string[]) =>void ): string[];
+    export function resolve6(domain: string): Promise<string[]>;
+    export function resolve6(domain: string, callback: (err: Error, addresses: string[]) =>void ): string[];
+    export function resolveMx(domain: string): Promise<string[]>;
+    export function resolveMx(domain: string, callback: (err: Error, addresses: string[]) =>void ): string[];
+    export function resolveTxt(domain: string): Promise<string[]>;
+    export function resolveTxt(domain: string, callback: (err: Error, addresses: string[]) =>void ): string[];
+    export function resolveSrv(domain: string): Promise<string[]>;
+    export function resolveSrv(domain: string, callback: (err: Error, addresses: string[]) =>void ): string[];
+    export function resolveNs(domain: string): Promise<string[]>;
+    export function resolveNs(domain: string, callback: (err: Error, addresses: string[]) =>void ): string[];
+    export function resolveCname(domain: string): Promise<string[]>;
+    export function resolveCname(domain: string, callback: (err: Error, addresses: string[]) =>void ): string[];
+    export function reverse(ip: string): Promise<string[]>;
+    export function reverse(ip: string, callback: (err: Error, domains: string[]) =>void ): string[];
+}
+
+declare module "mz/crypto" {
+    export interface CredentialDetails {
+        pfx: string;
+        key: string;
+        passphrase: string;
+        cert: string;
+        ca: any;    //string | string array
+        crl: any;   //string | string array
+        ciphers: string;
+    }
+    export interface Credentials { context?: any; }
+    export function createCredentials(details: CredentialDetails): Credentials;
+    export function createHash(algorithm: string): Hash;
+    export function createHmac(algorithm: string, key: string): Hmac;
+    export function createHmac(algorithm: string, key: Buffer): Hmac;
+    export interface Hash {
+        update(data: any, input_encoding?: string): Hash;
+        digest(encoding: 'buffer'): Buffer;
+        digest(encoding: string): any;
+        digest(): Buffer;
+    }
+    export interface Hmac extends NodeJS.ReadWriteStream {
+        update(data: any, input_encoding?: string): Hmac;
+        digest(encoding: 'buffer'): Buffer;
+        digest(encoding: string): any;
+        digest(): Buffer;
+    }
+    export function createCipher(algorithm: string, password: any): Cipher;
+    export function createCipheriv(algorithm: string, key: any, iv: any): Cipher;
+    export interface Cipher {
+        update(data: Buffer): Buffer;
+        update(data: string, input_encoding?: string, output_encoding?: string): string;
+        final(): Buffer;
+        final(output_encoding: string): string;
+        setAutoPadding(auto_padding: boolean): void;
+    }
+    export function createDecipher(algorithm: string, password: any): Decipher;
+    export function createDecipheriv(algorithm: string, key: any, iv: any): Decipher;
+    export interface Decipher {
+        update(data: Buffer): Buffer;
+        update(data: string, input_encoding?: string, output_encoding?: string): string;
+        final(): Buffer;
+        final(output_encoding: string): string;
+        setAutoPadding(auto_padding: boolean): void;
+    }
+    export function createSign(algorithm: string): Signer;
+    export interface Signer extends NodeJS.WritableStream {
+        update(data: any): void;
+        sign(private_key: string, output_format: string): string;
+    }
+    export function createVerify(algorith: string): Verify;
+    export interface Verify extends NodeJS.WritableStream {
+        update(data: any): void;
+        verify(object: string, signature: string, signature_format?: string): boolean;
+    }
+    export function createDiffieHellman(prime_length: number): DiffieHellman;
+    export function createDiffieHellman(prime: number, encoding?: string): DiffieHellman;
+    export interface DiffieHellman {
+        generateKeys(encoding?: string): string;
+        computeSecret(other_public_key: string, input_encoding?: string, output_encoding?: string): string;
+        getPrime(encoding?: string): string;
+        getGenerator(encoding: string): string;
+        getPublicKey(encoding?: string): string;
+        getPrivateKey(encoding?: string): string;
+        setPublicKey(public_key: string, encoding?: string): void;
+        setPrivateKey(public_key: string, encoding?: string): void;
+    }
+    export function getDiffieHellman(group_name: string): DiffieHellman;
+    export function pbkdf2(password: string|Buffer, salt: string|Buffer, iterations: number, keylen: number): Promise<Buffer>;
+    export function pbkdf2(password: string|Buffer, salt: string|Buffer, iterations: number, keylen: number, callback: (err: Error, derivedKey: Buffer) => any): void;
+    export function pbkdf2(password: string|Buffer, salt: string|Buffer, iterations: number, keylen: number, digest: string): Promise<Buffer>;
+    export function pbkdf2(password: string|Buffer, salt: string|Buffer, iterations: number, keylen: number, digest: string, callback: (err: Error, derivedKey: Buffer) => any): void;
+    export function pbkdf2Sync(password: string|Buffer, salt: string|Buffer, iterations: number, keylen: number) : Buffer;
+    export function pbkdf2Sync(password: string|Buffer, salt: string|Buffer, iterations: number, keylen: number, digest: string) : Buffer;
+    //export function randomBytes(size: number): Buffer;
+    export function randomBytes(size: number): Promise<Buffer>;
+    //export function randomBytes(size: number): Buffer;
+    export function randomBytes(size: number, callback: (err: Error, buf: Buffer) =>void ): void;
+    //export function pseudoRandomBytes(size: number): Buffer;
+    export function pseudoRandomBytes(size: number): Promise<Buffer>;
+    //export function pseudoRandomBytes(size: number): Buffer;
+    export function pseudoRandomBytes(size: number, callback: (err: Error, buf: Buffer) =>void ): void;
+    export interface RsaPublicKey {
+        key: string;
+        padding?: any;
+    }
+    export interface RsaPrivateKey {
+        key: string;
+        passphrase?: string,
+        padding?: any;
+    }
+    export function publicEncrypt(public_key: string|RsaPublicKey, buffer: Buffer): Buffer
+    export function privateDecrypt(private_key: string|RsaPrivateKey, buffer: Buffer): Buffer
+}
+
+declare module "mz/child_process" {
+    import * as events from "events";
+    import * as stream from "stream";
+
+    export interface ChildProcess extends events.EventEmitter {
+        stdin:  stream.Writable;
+        stdout: stream.Readable;
+        stderr: stream.Readable;
+        stdio: (stream.Readable|stream.Writable)[];
+        pid: number;
+        kill(signal?: string): void;
+        send(message: any, sendHandle?: any): void;
+        disconnect(): void;
+        unref(): void;
+    }
+
+    export function spawn(command: string, args?: string[], options?: {
+        cwd?: string;
+        stdio?: any;
+        custom?: any;
+        env?: any;
+        detached?: boolean;
+    }): ChildProcess;
+    export function exec(command: string, options: {
+        cwd?: string;
+        stdio?: any;
+        customFds?: any;
+        env?: any;
+        encoding?: string;
+        timeout?: number;
+        maxBuffer?: number;
+        killSignal?: string;
+    }): Promise<[Buffer, Buffer]>;
+    export function exec(command: string, options: {
+        cwd?: string;
+        stdio?: any;
+        customFds?: any;
+        env?: any;
+        encoding?: string;
+        timeout?: number;
+        maxBuffer?: number;
+        killSignal?: string;
+    }, callback?: (error: Error, stdout: Buffer, stderr: Buffer) =>void ): ChildProcess;
+    export function exec(command: string): Promise<[Buffer, Buffer]>;
+    export function exec(command: string, callback?: (error: Error, stdout: Buffer, stderr: Buffer) =>void ): ChildProcess;
+    export function execFile(file: string): Promise<[Buffer, Buffer]>;
+    export function execFile(file: string,
+        callback?: (error: Error, stdout: Buffer, stderr: Buffer) =>void ): ChildProcess;
+    export function execFile(file: string, args?: string[]): Promise<[Buffer, Buffer]>;
+    export function execFile(file: string, args?: string[],
+        callback?: (error: Error, stdout: Buffer, stderr: Buffer) =>void ): ChildProcess;
+    export function execFile(file: string, args?: string[], options?: {
+        cwd?: string;
+        stdio?: any;
+        customFds?: any;
+        env?: any;
+        encoding?: string;
+        timeout?: number;
+        maxBuffer?: number;
+        killSignal?: string;
+    }): Promise<[Buffer, Buffer]>;
+    export function execFile(file: string, args?: string[], options?: {
+        cwd?: string;
+        stdio?: any;
+        customFds?: any;
+        env?: any;
+        encoding?: string;
+        timeout?: number;
+        maxBuffer?: number;
+        killSignal?: string;
+    }, callback?: (error: Error, stdout: Buffer, stderr: Buffer) =>void ): ChildProcess;
+    export function fork(modulePath: string, args?: string[], options?: {
+        cwd?: string;
+        env?: any;
+        execPath?: string;
+        execArgv?: string[];
+        silent?: boolean;
+        uid?: number;
+        gid?: number;
+    }): ChildProcess;
+    export function spawnSync(command: string, args?: string[], options?: {
+        cwd?: string;
+        input?: string | Buffer;
+        stdio?: any;
+        env?: any;
+        uid?: number;
+        gid?: number;
+        timeout?: number;
+        maxBuffer?: number;
+        killSignal?: string;
+        encoding?: string;
+    }): {
+        pid: number;
+        output: string[];
+        stdout: string | Buffer;
+        stderr: string | Buffer;
+        status: number;
+        signal: string;
+        error: Error;
+    };
+    export function execSync(command: string, options?: {
+        cwd?: string;
+        input?: string|Buffer;
+        stdio?: any;
+        env?: any;
+        uid?: number;
+        gid?: number;
+        timeout?: number;
+        maxBuffer?: number;
+        killSignal?: string;
+        encoding?: string;
+    }): string | Buffer;
+    export function execFileSync(command: string, args?: string[], options?: {
+        cwd?: string;
+        input?: string|Buffer;
+        stdio?: any;
+        env?: any;
+        uid?: number;
+        gid?: number;
+        timeout?: number;
+        maxBuffer?: number;
+        killSignal?: string;
+        encoding?: string;
+    }): string | Buffer;
+}
+
+
+declare module "mz/zlib" {
+    import * as stream from "stream";
+    export interface ZlibOptions { chunkSize?: number; windowBits?: number; level?: number; memLevel?: number; strategy?: number; dictionary?: any; }
+
+    export interface Gzip extends stream.Transform { }
+    export interface Gunzip extends stream.Transform { }
+    export interface Deflate extends stream.Transform { }
+    export interface Inflate extends stream.Transform { }
+    export interface DeflateRaw extends stream.Transform { }
+    export interface InflateRaw extends stream.Transform { }
+    export interface Unzip extends stream.Transform { }
+
+    export function createGzip(options?: ZlibOptions): Gzip;
+    export function createGunzip(options?: ZlibOptions): Gunzip;
+    export function createDeflate(options?: ZlibOptions): Deflate;
+    export function createInflate(options?: ZlibOptions): Inflate;
+    export function createDeflateRaw(options?: ZlibOptions): DeflateRaw;
+    export function createInflateRaw(options?: ZlibOptions): InflateRaw;
+    export function createUnzip(options?: ZlibOptions): Unzip;
+
+    export function deflate(buf: Buffer): Promise<any>;
+
+    export function deflate(buf: Buffer, callback: (error: Error, result: any) =>void ): void;
+    export function deflateSync(buf: Buffer, options?: ZlibOptions): any;
+    export function deflateRaw(buf: Buffer): Promise<any>;
+    export function deflateRaw(buf: Buffer, callback: (error: Error, result: any) =>void ): void;
+    export function deflateRawSync(buf: Buffer, options?: ZlibOptions): any;
+    export function gzip(buf: Buffer): Promise<any>;
+    export function gzip(buf: Buffer, callback: (error: Error, result: any) =>void ): void;
+    export function gzipSync(buf: Buffer, options?: ZlibOptions): any;
+    export function gunzip(buf: Buffer): Promise<any>;
+    export function gunzip(buf: Buffer, callback: (error: Error, result: any) =>void ): void;
+    export function gunzipSync(buf: Buffer, options?: ZlibOptions): any;
+    export function inflate(buf: Buffer): Promise<any>;
+    export function inflate(buf: Buffer, callback: (error: Error, result: any) =>void ): void;
+    export function inflateSync(buf: Buffer, options?: ZlibOptions): any;
+    export function inflateRaw(buf: Buffer): Promise<any>;
+    export function inflateRaw(buf: Buffer, callback: (error: Error, result: any) =>void ): void;
+    export function inflateRawSync(buf: Buffer, options?: ZlibOptions): any;
+    export function unzip(buf: Buffer): Promise<any>;
+    export function unzip(buf: Buffer, callback: (error: Error, result: any) =>void ): void;
+    export function unzipSync(buf: Buffer, options?: ZlibOptions): any;
+
+    // Constants
+    export var Z_NO_FLUSH: number;
+    export var Z_PARTIAL_FLUSH: number;
+    export var Z_SYNC_FLUSH: number;
+    export var Z_FULL_FLUSH: number;
+    export var Z_FINISH: number;
+    export var Z_BLOCK: number;
+    export var Z_TREES: number;
+    export var Z_OK: number;
+    export var Z_STREAM_END: number;
+    export var Z_NEED_DICT: number;
+    export var Z_ERRNO: number;
+    export var Z_STREAM_ERROR: number;
+    export var Z_DATA_ERROR: number;
+    export var Z_MEM_ERROR: number;
+    export var Z_BUF_ERROR: number;
+    export var Z_VERSION_ERROR: number;
+    export var Z_NO_COMPRESSION: number;
+    export var Z_BEST_SPEED: number;
+    export var Z_BEST_COMPRESSION: number;
+    export var Z_DEFAULT_COMPRESSION: number;
+    export var Z_FILTERED: number;
+    export var Z_HUFFMAN_ONLY: number;
+    export var Z_RLE: number;
+    export var Z_FIXED: number;
+    export var Z_DEFAULT_STRATEGY: number;
+    export var Z_BINARY: number;
+    export var Z_TEXT: number;
+    export var Z_ASCII: number;
+    export var Z_UNKNOWN: number;
+    export var Z_DEFLATED: number;
+    export var Z_NULL: number;
+}
+
+declare module "mz/readline" {
+    import * as events from "events";
+    import * as stream from "stream";
+
+    export interface Key {
+        sequence?: string;
+        name?: string;
+        ctrl?: boolean;
+        meta?: boolean;
+        shift?: boolean;
+    }
+
+    export interface ReadLine extends events.EventEmitter {
+        setPrompt(prompt: string): void;
+        prompt(preserveCursor?: boolean): void;
+        question(query: string, callback: (answer: string) => void): void;
+        question(query: string): Promise<string>;
+        pause(): ReadLine;
+        resume(): ReadLine;
+        close(): void;
+        write(data: string|Buffer, key?: Key): void;
+    }
+
+    export interface Completer {
+        (line: string): Promise<[string[], string]>;
+        (line: string): [string[], string];
+        (line: string, callback: (err: any, result: [string[], string]) => void): any;
+        (line: string, callback: (err: any, result: CompleterResult) => void): any;
+    }
+
+    export interface CompleterResult {
+        completions: string[];
+        line: string;
+    }
+
+    export interface ReadLineOptions {
+        input: NodeJS.ReadableStream;
+        output?: NodeJS.WritableStream;
+        completer?: Completer;
+        terminal?: boolean;
+        historySize?: number;
+    }
+
+    export function createInterface(input: NodeJS.ReadableStream, output?: NodeJS.WritableStream, completer?: Completer, terminal?: boolean): ReadLine;
+    export function createInterface(options: ReadLineOptions): ReadLine;
+
+    export function cursorTo(stream: NodeJS.WritableStream, x: number, y: number): void;
+    export function moveCursor(stream: NodeJS.WritableStream, dx: number|string, dy: number|string): void;
+    export function clearLine(stream: NodeJS.WritableStream, dir: number): void;
+    export function clearScreenDown(stream: NodeJS.WritableStream): void;
+}
+
+
+declare module "mz"{
+    export import child_process = require("mz/child_process");
+    export import crypto = require("mz/child_process")
+    export import dns = require("mz/dns")
+    export import fs = require("mz/fs")
+    export import readline = require("mz/readline")
+    export import zlib = require("mz/zlib")
+}