Deal with SWITCH cases that have no cases. In ABC this is always compiled to at least case offset and one default offset. And it really looks like an IF.
Give IR nodes better constructor names so that they appear nicer in the profiler and the debugger.
Add main Box2D test. It now works in the interpretr, and in the compiler (- verifier) - graphics bugs.
Merge pull request #166 from mbebenita/master

Got main Box2D test case sorta working.