added definitions for mkdirp

mkdirp/mkdirp-tests.ts

@@ -0,0 +1,16 @@
+/// <reference path="mkdirp.d.ts" />
+
+import mkdirp = require('mkdirp');
+
+var str: string;
+var num: number;
+
+mkdirp(str, num, (err, made) => {
+	str = made;
+});
+mkdirp(str, (err, made) => {
+	str = made;
+});
+
+str = mkdirp.sync(str, num);
+str = mkdirp.sync(str);

mkdirp/mkdirp.d.ts

@@ -0,0 +1,15 @@
+// Type definitions for mkdirp 0.3.0
+// Project: http://github.com/substack/node-mkdirp
+// Definitions by: Bart van der Schoor <https://github.com/Bartvds>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare module 'mkdirp' {
+
+	function mkdirp(dir: string, cb: (err: any, made: string) => void): void;
+	function mkdirp(dir: string, flags: any, cb: (err: any, made: string) => void): void;
+
+	module mkdirp {
+		function sync(dir: string, flags?: any): string;
+	}
+	export = mkdirp;
+}