added _.cloneDeep definitions

lodash/lodash-tests.ts

@@ -538,6 +538,11 @@ var result = <any>_.clone(stoogesAges, true, function(value) {
     return _.isElement(value) ? value.cloneNode(false) : undefined;
 });
 
+var result = <any>_.cloneDeep(stoogesAges);
+var result = <any>_.cloneDeep(stoogesAges, function(value) {
+    return _.isElement(value) ? value.cloneNode(false) : undefined;
+});
+
 var mergeNames = {
   'stooges': [
     { 'name': 'moe' },
@@ -594,9 +599,6 @@ _.omit({ name: 'moe', age: 50, userid: 'moe1' }, ['name', 'age']);
 var iceCream = { flavor: "chocolate" };
 _.defaults(iceCream, { flavor: "vanilla", sprinkles: "lots" });
 
-_.clone({ name: 'moe' });
-_.clone(['i', 'am', 'an', 'object!']);
-
 _([1, 2, 3, 4])
 	.chain()
 	.filter((num: number) => {

lodash/lodash.d.ts

@@ -2175,6 +2175,25 @@ declare module _ {
 		callback?: (value: any) => any,
 		thisArg?: any): T;
 
+	/**
+	* Creates a deep clone of value. If a callback is provided it will be executed to produce the 
+	* cloned values. If the callback returns undefined cloning will be handled by the method instead. 
+	* The callback is bound to thisArg and invoked with one argument; (value).
+	*
+	* Note: This method is loosely based on the structured clone algorithm. Functions and DOM nodes 
+	* are not cloned. The enumerable properties of arguments objects and objects created by constructors 
+	* other than Object are cloned to plain Object objects. 
+	* See http://www.w3.org/TR/html5/infrastructure.html#internal-structured-cloning-algorithm.
+	* @param value The value to clone.
+	* @param callback The function to customize cloning values.
+	* @param thisArg The this binding of callback.
+	* @return The cloned value.
+	**/
+	export function cloneDeep<T>(
+		value: T,
+		callback?: (value: any) => any,
+		thisArg?: any): T;
+
 	/**
 	* Recursively merges own enumerable properties of the source object(s), that don't resolve 
 	* to undefined into the destination object. Subsequent sources will overwrite property