Pre-built SFML static libs for Visual Studio 2012 (November CTP compiler)
Decided AppState didn't need a virtual onEvent function. An AppState shouldn't have to do anything other than call SFMLEvent::OnEvent to process an event (there shouldn't be anything else to foward an event to past AppState.)
Redefined SFML window size to match the chessboard (640x640)
Modified ResourceManager to use std::unique_ptr<T> instead of a shared_ptr. The reference counting function of shared_ptr wasn't going to be taken advantage of, so unique_ptr was more appropriate.

The Load() function now returns a pointer to an existing texture.