Quote ks/cf names better.

Patch by Alex Liu, reviewed by brandonwilliams for CASSANDRA-7093
Fix 2ndary index queries with DESC clustering order

patch by slebresne; reviewed by thobbs for CASSANDRA-6950
Invalidate key cache on table drop

patch by thobbs; reviewed by slebresne for CASSANDRA-6525
Fix flapping RecoveryManagerTest

patch by benedict; reviewed by jbellis for CASSANDRA-7084
Add missing iso8601 patterns for date strings

patch by chander; reviewed by slebresne for CASSANDRA-6973
Merge branch 'cassandra-2.0' into CASSANDRA-6875-2.0

Conflicts:
	src/java/org/apache/cassandra/cql3/statements/SelectStatement.java
Use restrictions[0] instead of creating an iterator