cleanup
CHANGES
Fix AE when SSTable is closed without releasing reference

patch by yukim and benedict; reviewed by thobbs and Ben Chan for
CASSANDRA-7000
Merge branch 'cassandra-2.1' into trunk
Remove Closable from SSTableReader

to clarify the way to release resource held by SSTableReader
Merge branch 'cassandra-2.1' into trunk
Shutdown batchlog executor in SS#drain()

patch by Sergio Bossa; reviewed by Aleksey Yeschenko for CASSANDRA-7025
Merge branch 'cassandra-1.2' into cassandra-2.0
Merge branch 'cassandra-2.0' into cassandra-2.1

Conflicts:
	src/java/org/apache/cassandra/service/StorageService.java
Merge branch 'cassandra-2.1' into trunk
Fix ticket number in CHANGES
Merge branch 'cassandra-2.0' into cassandra-2.1
Merge branch 'cassandra-2.1' into trunk
Fix sstableloader NPE

patch by benedict; reviewed by yukim for CASSANDRA7015
Merge branch 'cassandra-2.1' into trunk
Update versions for 2.0.7 release
Clean up IndexInfo on keyspace/table drops

patch by Sam Tunnicliffe; reviewed by Aleksey Yeschenko for
CASSANDRA-6924
Merge branch 'cassandra-2.1' into trunk
Snapshot only related SSTables when sequential repair

patch by yukim; reviewed by jmckenzie for CASSANDRA-7024
Merge branch 'cassandra-2.1' into trunk