Schedule fat client schema pull on join

patch by Oleg Anastasyev; reviewed by Aleksey Yeschenko for
CASSANDRA-7993
Merge branch 'cassandra-2.0' into cassandra-2.1

Conflicts:
	CHANGES.txt
Merge branch 'cassandra-2.1' into trunk
Don't re-parse already prepared statements

Patch by Benedict Elliot Smith and Tyler Hobbs; reviewed by Aleksey
Yeschenko for CASSANDRA-7923
Merge remote-tracking branch 'origin/trunk' into 7813-udf-keyspace
Merge branch 'cassandra-2.1' into trunk

Conflicts:
	src/java/org/apache/cassandra/thrift/CassandraServer.java
custom exceptions should derive from Exception, not Throwable
ninja reviewed by yukim
Merge branch 'cassandra-2.1' into trunk
Don't duplicate sstables smaller than split size

Patch by Changsu Jiang; reviewed by Tyler Hobbs for CASSANDRA-7616
Merge branch 'cassandra-2.1' into trunk
Support scripting languages for UDFs

Patch by Robert Stupp; reviewed by Tyler Hobbs for CASSANDRA-7526
Upgrade netty to 4.0.23 enable epoll

Patch by tjake; reviewed by Jason Brown for CASSANDRA-7761
Merge branch 'cassandra-2.1' into trunk

Conflicts:
	NEWS.txt
	src/java/org/apache/cassandra/transport/Server.java
Merge remote-tracking branch 'origin/trunk' into 7813-udf-keyspace

Conflicts:
	test/unit/org/apache/cassandra/cql3/UFTest.java