don't combine file readers and writers across languages
fixed cpp performance timer
CUDA fix: Add guard for ReduceElem combine function
fixed more cpp stream bugs
Merge branch 'wip-clusters2' of github.com:stanford-ppl/Delite into wip-clusters2
created fixed threadpool for cpp execution
bugfix for supported targets restrictions
reverted non-working c++ blas hacks, needs further investigation
Merge branch 'develop' into optiml-clusters

Conflicts:
	framework/src/ppl/delite/framework/ops/DeliteOpsBaseGenericGen.scala