Make sure compaction throughput values doesn't overflow because of int math
patch by pvai reviewed by dbrosius for cassandra-6647
Update news, version in preparation for 1.2.15
Remove/update invalid sentences in CQL doc
Fix partition and range deletes not triggering flush

patch by benedict; reviewed by slebresne for CASSANDRA-6655
Fix upgradesstables NPE for non-CF-based indexes
patch by Sergio Bossa; reviewed by jbellis for CASSANDRA-6645
Fix unwanted schema pull while upgrading nodes from 1.2 to 2.0
Patch by Sergio Bossa, reviewed by brandonwilliams for CASSANDRA-6678
Fix mean cells and mean row size per sstable calculations
patch by Paulo Gaspar, jbellis, and Marcus Eriksson for CASSANDRA-6667
Compact hints after partial replay to clean out tombstones
patch by jbellis; reviewed by ayeschenko for CASSANDRA-6666
fix race in LeaveAndBootstrapTest
add target to run specific test methods
Clean up Memtable.resolve()
Add bash completion to nodetool