update forge/delite to optiml-perf-improvements
Merge pull request #16 from stanford-ppl/wip-sbt13

Wip sbt13
merge master with optiml-perf-improvements
sync
check for required env variables in test-all.sh; update branch pointers
Merge branch 'master' into optiml-perf-improvements
Merge pull request #18 from stanford-ppl/optiml-perf-improvements

Optiml perf improvements
sync
update forge pointer
Merge pull request #19 from stanford-ppl/asserts

support for Forge asserts
enable testing c++ target
change submodule refs
Merge remote-tracking branch 'origin/master' into cpp
Merge pull request #20 from stanford-ppl/cpp

Cpp
sync refs
Merge branch 'master' into debugger
Merging changes from master