Changed the MultiGetColumnFamilySlice operator to check to see if a counter column type was returned, and do the subsequent conversion if found. Otherwise, default to normal behavior.
Made the same change to SuperColumnFamilies
Added a CounterColumnFamily to the DatabaseSetup
Finished adding the Counters bootstrap information to the CassandraDatabaseSetup.cs file and implemented the Counter_GetSlice_Columns() unit test in the MultiSliceGetTest.cs file