Slightly improved message when parsing properties for DDL queries

patch by boneill42; reviewed by slebresne for CASSANDRA-6453
caching all calls of cloneOnlyTokenMap is not correct since many callers mutate the result
patch by Aleksey Yeschenko; reviewed by jbellis for CASSANDRA-6488
merge from 1.2
Merge branch 'cassandra-2.0' into trunk
Simplify TokenMetadata.cachedOnlyTokenMap()
Merge branch 'cassandra-1.2' into cassandra-2.0
Merge branch 'cassandra-2.0' into trunk
Push composites support in the storage engine

patch by slebresne; reviewed by benedict for CASSANDRA-5417
Rename Column to Cell
Fix dereference after null check
ninja-correcting the the constant for LOCAL_ONE.
Merge branch 'cassandra-1.2' into cassandra-2.0
ninja-correcting the the constant for LOCAL_ONE in v2 of the native_protocol doc.
Merge branch 'cassandra-2.0' into trunk
Fix size-tiered compaction in LCS L0
patch by jbellis; reviewed by Marcus Eriksson and tested by Nikolai Grigoriev for CASSANDRA-9496
merge from 2.0
cleanup + debug logging
loop based on isClosed to accomodate SSL sockets
patch by Mikhail Stepura; reviewed by jbellis for CASSANDRA-6349
Merge branch 'cassandra-2.0' into trunk
Allow executing CREATE statement multiple times

patch by slebresne; reviewed by jbellis for CASSANDRA-6471