cleaned up UnionScan, added tests and adjusted namespace in perf_regression/UnionScan.cpp
Merge pull request #69 from timbokopter/feature/cleanup_UnionScan

cleaned up UnionScan and added tests
cleaned up access/MultiplyRefField
cleaned up access/Histogram
Merge pull request #78 from timbokopter/feature/cleanup_Histogram

cleaned up access/Histogram
Merge pull request #76 from timbokopter/feature/cleanup_MultiplyRefField

cleaned up access/MultiplyRefField