add some basic interfaces and supporting classes
add a bunch of ported math classes
add some basic platform interfaces
add some graphics-related classes
woops
add SDL input device class implementations
add SDL filesystem implementation
add SDL logger implementation
expand IPlatformServices a bit
add ScreenOrientation
add IGameApp interface
add ILooper.Run
add some basic SDL initialization and cleanup
initial SDL platform implementation support

yay for code-dumps!
fix SDL->key mapping
reset the OpenTK OpenGL context when destroying the SDL OpenGL context
reorganize a bunch of platform-class stuff
logging of events
don't really need the full (external) window dimensions, just the client-area stuff
add window object property