fixed div and mod folding
Fixed bug in negative constant folding.
Merge branch 'dev' of github.com:djrieger/mjplusplus into dev

Conflicts:
	src/firm_interface/visitors/MemberVisitor.cpp
Merge branch 'dev' of github.com:djrieger/mjplusplus into dev
Removed printf's.
Implemented phi
Implemented Worklist class (proposal, in comments as of now)
Compressed code for Cmp optimization.
Merge branch 'dev' of https://github.com/djrieger/mjplusplus into dev

Conflicts:
	src/firm_interface/FirmInterface.cpp
	src/firm_interface/FirmInterface.hpp
	src/firm_interface/visitors/MemberVisitor.cpp
Merge branch 'dev' of https://github.com/djrieger/mjplusplus into dev
Slightly modified macro.
Merge branch 'dev' of github.com:djrieger/mjplusplus into dev
generated documentation