Adding a bunch of gulp utilities

This should allow a developer to write a gulpfile in TypeScript to
compile a TypeScript project.

gulp-mocha/gulp-mocha-tests.ts

@@ -0,0 +1,9 @@
+/// <reference path="./gulp-mocha.d.ts"/>
+/// <reference path="../gulp/gulp.d.ts"/>
+import gulp = require("gulp");
+import mocha = require("gulp-mocha");
+
+gulp.task('default', function () {
+    return gulp.src('test.js', {read: false})
+        .pipe(mocha({reporter: 'nyan'}));
+});

gulp-mocha/gulp-mocha.d.ts

@@ -0,0 +1,12 @@
+// Type definitions for gulp-mocha
+// Project: https://github.com/sindresorhus/gulp-mocha
+// Definitions by: Asana <https://asana.com>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="../mocha/mocha.d.ts"/>
+/// <reference path="../node/node.d.ts"/>
+
+declare module "gulp-mocha" {
+    function mocha(setupOptions: MochaSetupOptions): NodeJS.ReadWriteStream;
+    export = mocha;
+}