Added device_vector iterators to reduce_by_key; added test cases; reduce_by_key works with offsets now
Removed warnings in pair for 32-bit build
Added Fix for ushort in bolt.cpp + Added some test cases in Scan and ReduceByKey routines + Fixed EPR 377210
Merge pull request #48 from avinashcpandey/develop

Added Fix for ushort in bolt.cpp + Added some test cases in Scan and Red...
Added cl_ushort test cases for copy, fill & generate