added device orientation for WP8
removed windows.h
added LEAN_AND_MEAN define
added LEAN_AND_MEAN define
added device orientation for WP8
added precompiled header support
updated to angle refactor. Use DrawingSurfaceBackgroundGrid instead of DrawingSurface
added angle file copy script
commented out line
updated prebuilt angle libs for winrt and wp8
added .gitignore
added exp files
enabled precompiled headers