Updated Implementation (markdown)

Implementation.md

@@ -18,6 +18,14 @@ DirectXTK's implementation makes extensive use of the [pImpl idiom](http://en.wi
     class SpriteBatch
     {
     public:
+        SpriteBatch();
+        SpriteBatch(SpriteBatch&& moveFrom);
+        SpriteBatch& operator= (SpriteBatch&& moveFrom);
+
+        SpriteBatch(SpriteBatchconst&) = delete;
+        SpriteBatch& operator=(SpriteBatchconst&) = delete;
+
+        virtual ~SpriteBatch();
         ...
     
     private: