look for SDL2 in configure
start of SDL2 support class, untested
convert keyboard types, get gui compiling
get ui compiling
move SDLGraphics to Graphics::WindowSDL
first stab at moving SDL and GL init into WindowSDL
get TextureBuilder compiling
renderers now carry their window around, so call through it
fix key state arrays aren't really going to fly anymore...
window icon will be set in window init
more nits
thread names!
keypad syms
keysyms aren't in any particular order anymore, so avoiding control keys this way won't work
everything else. compiling!
these can't be null
clean up new modelview stuff
no more unicode, will have to switch over to TextInputEvent