fix AntiCompacitonTest
who forgets to add files? I do.
ColumnFamily-related cleanups

patch by Aleksey Yeschenko; reviewed by Benedict Elliott Smith for
CASSANDRA-6662
Optimize (rewrite) ArrayBackedSortedColumns

patch by Aleksey Yeschenko; reviewed by Benedict Elliott Smith for
CASSANDRA-6662
Replace TMBSC usage with ABSC and kill TMBSC