License filename renaming
Fix loading index summary containing empty key

patch by yukim; reviewed by jbellis for CASSANDRA-5965
Rename clustering keys to clustering columns in doc
update build.xml for metrics-core 2.2.0
Rename in tracing: Index sample -> Partition summary
typo
Correctly handle limits in CompositesSearcher

patch by Aleksey Yeschenko; reviewed by Sylvain Lebresne for
CASSANDRA-5975
Pig support for CQL collections.
Patch by Alex Liu, reviewed by brandonwilliams for CASSANDRA-5867
Pass the updated cf to the PRSI index() method

patch by Ben Coverston; reviewed by Aleksey Yeschenko for
CASSANDRA-5999
Allow empty CQL3 batches as no-op

patch by slebresne; reviewed by iamaleksey for CASSANDRA-5994
Support null in CQL3 functions

patch by slebresne; reviewed by iamaleksey for CASSANDRA-5910
Support thrift tables in Pig CqlStorage
Patch by Alex Liu, reviewed by brandonwilliams for CASSANDRA-5847
Fix possible divide-by-zero in HHOM
patch by jbellis for CASSANDRA-5990
enhance UntypedResultSet
patch by Ben Coverston; reviewed by jbellis for CASSANDRA-6000
Replace the deprecated MapMaker with CacheLoader

patch by Aleksey Yeschenko; reviewed by Jonathan Ellis for
CASSANDRA-6007
Add SSTableDeletingNotification to DataTracker

patch by Piotr Kołaczkowski; reviewed by Aleksey Yeschenko for
CASSANDRA-6010
Fix CQLRW for thrift tables
patch by Alex Liu; reviewed by jbellis for CASSANDRA-6002
Fix snapshots in use get deleted during snapshot repair

patch by yukim; reviewed by jbellis for CASSANDRA-6011
Move hints and exception count to o.a.c.metrics

patch by yukim; reviewed by jbellis for CASSANDRA-6017
Fix NPE in nodetool on booting instances.
Patch by Mikhail Stepura, reviewed by brandonwilliams for CASSANDRA-5968