cleanup
CHANGES
merge
Merge remote-tracking branch 'origin/cassandra-2.0' into cassandra-2.0
Merge branch 'cassandra-2.0' into cassandra-2.1
remove invalid assert
patch by Benedict Elliott Smith; reviewed by jbellis for CASSANDRA-6987
Add range tombstones to read repair digests
patch by Oleg Anastasyev; reviewed by jbellis for CASSANDRA-6863