added copyright notice to HashBuildTests.cpp and HashJoinProbeTests.cpp
cleaned up access/IndexScan
cleaned up access/IndexScan, added setValue<T> and setIndexName to actually make it work
added IndexScanTests to units_access
cleaned up access/InsertScan
added InsertScanTests to units_access
cleaned up access/Layouter
cleaned up access/LayoutTable
cleaned up access/LayoutTableLoad
cleaned up access/LoadFile
added LoadFileTests to units/access
cleaned up access/MaterializingScan