Adding a bunch of gulp utilities

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

gulp-replace/gulp-replace.d.ts

@@ -0,0 +1,17 @@
+// Type definitions for gulp-replace
+// Project: https://github.com/lazd/gulp-replace
+// Definitions by: Asana <https://asana.com>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="../node/node.d.ts"/>
+
+declare module "gulp-replace" {
+    interface Options {
+        skipBinary: boolean;
+    }
+
+    function replace(pattern: string, replacement: string, opts?: Options): NodeJS.ReadWriteStream;
+    function replace(pattern: RegExp, replacement: string, opts?: Options): NodeJS.ReadWriteStream;
+
+    export = replace;
+}