Versions update for 1.2.18
Warn when SSL certs have expired.

Patch by brandonwilliams, reviewed by jasobrown for CASSANDRA-7528
Merge branch 'cassandra-2.0' into cassandra-2.1.0

Conflicts:
	CHANGES.txt
Merge branch 'cassandra-2.1.0' into cassandra-2.1
Merge branch 'cassandra-2.1' into trunk
Set stream ID on response for non-Exception Throwables

Patch by Tyler Hobbs; reviewed by Aleksey Yeschenko for CASSANDRA-7470
Merge branch 'cassandra-1.2' into cassandra-2.0

Conflicts:
	CHANGES.txt
	NEWS.txt
	build.xml
	debian/changelog
Merge branch 'cassandra-2.0' into cassandra-2.1.0

Conflicts:
	CHANGES.txt
Merge branch 'cassandra-2.1.0' into cassandra-2.1
Merge branch 'cassandra-2.1' into trunk
Make cql3 word count executable
Merge branch 'cassandra-2.0' into cassandra-2.1
Merge branch 'cassandra-2.1' into trunk
Make cql3 word count executable
Merge branch 'cassandra-2.1.0' into cassandra-2.1
Merge branch 'cassandra-2.1' into trunk
Configurable client timeout for cqlsh.

patch by Ryan McGuire; reviewed by Mikhail Stepura for CASSANDRA-7516
Merge branch 'cassandra-2.1' into trunk
Add listen_interface and rpc_interface options
patch by Matt Kennedy; reviewed by Tupshin Harper and jbellis for CASSANDRA-7417
Merge branch 'cassandra-2.1' into trunk