Created separate module TmpAndLabel for management of temporaries and
labels.
Various additions to r2mu:
- Reflect labels in muWhile.
- Added implementation for break and continue.
Changed code generation for control flow.
- All loops have now names and break/continue/fail labels are derived
from it.
- Improved code for backtracking.
- Added cases for muContinue, etc.
Extended muFunction with fields modifiers and tags:
- modifiers (test/java/default) and tags are now passed from front-end
to backend.