Changed SetMatch to ignore order of results.
Merge branch 'master' of https://github.com/cwi-swat/rascal.git
Merge branch 'master' of https://github.com/cwi-swat/rascal.git
Moved handling of muPrimitives out of main interpreter loop

Surprisingly, the extra costs of a reflective method call are offset by
avoiding cache misses. We are back at our previous performance :-)