MouseControllerComponent created and mouse movement through raw input is now complete.  Modified WinMain loop to properly clear all WIN messages in a frame.  Adding MouseControllerComponent to any entity allows it to be controlled like a mouse pointer.  Limit one mouse controller at a time (you can't create more than one, dummy).
Mouse clicking for buttons 1-5 is now implemented.

Probably going to create another branch off this to clean up and refactor input, don't like how messy it is now.
Clamped mouse to the window RECT now.