Added box2d, added a whole bunch of classes, the compositioncore, and so on.
Merge branch 'master' of git@github.com:null0000/MOV.git
Got keyboard commands working properly. Now performed by implementing
scInputDevice and connecting everything from main window to the input
device.
Committing some shit.

Walking around now works, shit's displaying.

Didn't really add anything new, just stuck
everything together and made it work right.

Signed-off-by: null000 <gorha032@umn.edu>
Refactored ownership of scworld, sckeyboardmap/state,
and a few other things so that they're controlled
through typedefs.

Signed-off-by: null000 <gorha032@umn.edu>