Don't patch overriden traits.
Fix callpropvoid
Don't trace colors in the browser.
Mark calls as pristine by default to avoid .call/.apply
Fix coerceString in builder.
Don't pin findProperty to regions, probably unsafe but unlikely to cause problems.
Mark calls to coercions in method prologue as pristine.
Add pristine property to IR.Call
Propagate vector types better in the inferrer.
Factor out def-use chains.
Better function names to help with debugging.
Merge pull request #179 from mbebenita/master

Several compiler improvements.