Make sure unfinished compaction files are removed.

Patch by marcuse; reviewed by yukim for CASSANDRA-8124
Refactor how we track live size

Patch by marcuse; reviewed by yukim for CASSANDRA-7852
Merge branch 'cassandra-2.1' into trunk

Conflicts:
	src/java/org/apache/cassandra/db/compaction/CompactionManager.java
	src/java/org/apache/cassandra/db/compaction/Upgrader.java
	src/java/org/apache/cassandra/io/sstable/SSTableRewriter.java
	test/unit/org/apache/cassandra/db/compaction/AntiCompactionTest.java
Improve client notification that nodes are ready for requests

Patch by Brandon Williams, reviewed by thobbs for CASSANDRA-7510
Merge branch 'cassandra-2.0' into cassandra-2.1

Conflicts:
	CHANGES.txt
Merge branch 'cassandra-2.1' into trunk
Clean up generics in dht package

Patch by blambov, reviewed by jmckenzie for CASSANDRA-8171
Merge branch 'cassandra-2.1' into trunk

Conflicts:
	src/java/org/apache/cassandra/cql/QueryProcessor.java
	src/java/org/apache/cassandra/io/sstable/format/big/BigTableWriter.java
Set socket timeout when reading remote version

Patch by wy96f, reviewed by Brandon Williams for CASSANDRA-8188
Merge branch 'cassandra-2.1' into trunk
Add 'nodetool statusgossip'

Patch by Jan Karlsson, reviewed by Brandon Williams for CASSANDRA-8125
Merge branch 'cassandra-2.0' into cassandra-2.1
Add 'nodetool statusgossip'

Patch by Jan Karlsson, reviewed by Brandon Williams for CASSANDRA-8125
Merge branch 'cassandra-2.1' into trunk
Fix repeating message when there are no hints to compact

Patch by carlyeks, reviewed by brandonwilliams for CASSANDRA-8247
Merge branch 'cassandra-2.1' into trunk
Fix repeated message when there are no hints to compact

Patch by carlyeks, reviwed by brandonwilliams for CASSANDRA-8247
Merge branch 'cassandra-2.0' into cassandra-2.1
Merge branch 'cassandra-2.1' into trunk
Add junitreport target.

patch by Mikhail Stepura; reviewed by Brandon Williams and Michael Shuler for CASSANDRA-6482