Expose thread pool metrics for the native protocol server

patch by mishail; reviewed by slebresne for CASSANDRA-6234
Add warning on collection limitations in CQL doc
Change snapshot response message verb

to make sure response do not get dropped

patch by yukim; reviewed by jbellis for CASSANDRA-6415
Reduce gossip memory use by interning VersionedValue strings
patch by jbellis; tested by Quentin Conner for CASSANDRA-6410
Revert "Reduce gossip memory use by interning VersionedValue strings"

This reverts commit 7ad39601dd3c248595d84f016c41ac35abd786ed.
Warn when a read collection has > 64k elements

patch by slebresne; reviewed by iamaleksey for CASSANDRA-5428
fix MoveTest
CHANGES
Fix cache persistence when both row and key cache are enabled
patch by Mikhail Stepura and jbellis for CASSANDRA-6413
add describe_local_ring for Hadoop's benefit
patch by Piotr Kołaczkowski; reviewed by jbellis for CASSANDRA-6268
Fix handling of concurrent directory creation failure

patch by Ryan Fowler; reviewed by Aleksey Yeschenko for
CASSANDRA-6459
Fix test build
Update versions for 1.2.13 release
Randomize batchlog candidates selection

patch by Aleksey Yeschenko; reviewed by Jonathan Ellis for
CASSANDRA-6481
Set javaagent for tools.
Patch by Sam Tunnecliffe, reviewed by brandonwilliams for CASSANDRA-6404
Fix CHANGES.txt
Pig: don't assume all DataBags are DefaultDataBags
Patch by Mike Spertus, reviewed by brandonwilliams for CASSANDRA-6420
fix race referencing tokenMetadataCache
patch by jbellis; reviewed by rbranson for CASSANDRA-6485
Improve batchlog write performance with vnodes

patch by Jonathan Ellis and Rick Branson; reviewed by Aleksey Yeschenko
for CASSANDRA-6488
Slightly improved message when parsing properties for DDL queries

patch by boneill42; reviewed by slebresne for CASSANDRA-6453