Prompt on missing dependency in cqlsh on Windows
Patch by Josh McKenzie, reviewed by Jonathan Ellis for CASSANDRA-7749
Merge branch 'cassandra-2.1' into trunk
Pass mutated cf to index updater for use by PRSI

patch by Sam Tunnicliffe; reviewed by Aleksey Yeschenko for
CASSANDRA-7742
Merge branch 'cassandra-2.1.0' into cassandra-2.1
Merge branch 'cassandra-2.1' into trunk
Remove netty buffer ref-counting

Patch by tjake; reviewed by benedict for CASSANDRA-7735
Merge branch 'cassandra-2.1.0' into cassandra-2.1
Merge branch 'cassandra-2.1' into trunk