Small optimization for Reduce by performing the last calculation on GPU with single WG instead of computing on CPU
Merge branch 'develop' of https://github.com/HSA-Libraries/Bolt into new-amp-functions
Added AMP Reduce By key, AMP-Pair, made some minor corrections and added offset support for device vector in case of serial & TBB for CL-count & reduce by key
Merge pull request #134 from shruti-ramesh/new-amp-functions

New amp functions
Added AMP constant and counting iterators
fixed merge EPR 391725
Merge branch 'develop' of https://github.com/HSA-Libraries/Bolt into develop