Add FindSDL2 and use it. Code not updated for SDL2 yet, compile fails. Hacks for OS X ported from old FindSDL (not sure if they are still required).
have it linking agains SDL2 libraries in stead of SDL1 libs
Merge remote-tracking branch 'origin/master' into sdl2

Conflicts:
	game/CMakeLists.txt
resolved input issues, now hits video stuff at 25% compiling.
video stuff SDL2 porting
final adjustments to SDL2 port, now only linking errors remain
fixed linking error
Program now actually RUNS!!!
don't use a renderer (scaling still broken :-( )
fullscreen is not 640x480 anymore, but still black screen...
fixed fullscreen bug, context is not destroyed anymore, resize event is
not triggered
forgot some comments
fixed resizing (in an ugly way, but window& context isn't triggered
anymore in resize() so it shouldn't be a problem)
ugly fix for window beeing too small
windows hack
resolved textinput issue
Fix the input issue where you couldn't control guitar/dance with
keyboard
?
Merge remote-tracking branch 'origin/master' into sdl2
added some work in the Authors.txt