Already committed to dev-0.4
Removing val definitions pointing to Unit values
+ Generating errors as comments
+ emitSource15 in GenericCodeGen
+ compile2 to compile5 added to ScalaCompile
+ Test check files has been updated.
Tuple6 lifter added.
List "foreach" method lifter added.
Merge branch 'develop' of https://github.com/TiarkRompf/virtualization-lms-core into develop

Conflicts:
	src/common/RangeOps.scala
	test-out/epfl/test11-hmm1.check
	test-out/epfl/test11-hmm2.check
	test-out/epfl/test11-stencil0.check
	test-out/epfl/test11-stencil2a.check
	test-out/epfl/test11-stencil3a.check