fix DEG parsing bug with conditionals, HashMap/GroupBy code gen bugs (with and without SoA)
resolve merge conflict
adding test for nested mutable writes. currently fails and needs a more in-depth investigation into solutions.
Merge branch 'wip-release' into ops-bugfix
cleaned up profiling hooks in runtime
Merge branch 'wip-release' of github.com:stanford-ppl/Delite into cdesa-release-test