Addsd libs to try out DirectXTK.
Cleaned up the code a bit and annotated it.

Included the DirectXTK library.
Added code to draw a sprite on the screen.
Refactored the main file a bit into an engine class.
Refactored the game engine.

Integrated the new game engine in the DX project.
Integrated the DirectXTK in the DirectX branch. Since I'm probably going to go with DTK anyway.

Refactored the game engine a bit.