Added some skeleton code

* Fix bug where uninitialized variables would crash state transition on
windows
* Added skeleton for basic game
* Added files to VS project - will need to be added to xcode
Expanded on Skeleton and added to Xcode project
Getting "I" up in here

* Made classes that will be game specific into interfaces
Added SFMLRenderer skeleton
Using SFMLRenderer skeleton in AstraeaStateBuilder & main
Merge branch 'addition/game_skeleton'