Trying to merge lewis changes
Merge branch 'booster-develop-0.3' of https://github.com/epfldata/lms into booster-develop-0.3

Conflicts:
	src/common/ArrayOps.scala
	src/common/BooleanOps.scala
	src/common/HashMapOps.scala
	src/common/IOOps.scala
CCodegen extensions. TPCHQ1/Q6 automatically built