move pig-test out of normal unit tests (still part of test-all)
Merge branch 'cassandra-2.0' into trunk
show how to make logback formatting match pre-2.1 default format
don't leave replaced SSTRs around to break other tests
patch by Tyler Hobbs
Improve gossip performance for typical messages
patch by jbellis; tested by Quentin Conner for CASSANDRA-6409
Merge branch 'cassandra-1.2' into cassandra-2.0
Merge branch 'cassandra-2.0' into trunk