Fix intersection with Bound computation

patch by wy96f; reviewed by slebresne for CASSANDRA-5551
Backport #5551 to 1.1
Merge branch 'cassandra-1.1' into cassandra-1.2
Fix changelog
add nodetool enablebackup/disablebackup
patch by pmargolin reviewed by dbrosius for CASSANDRA-5556
Ensure that submitBackground enqueues at least one task
patch by Oleg Anastasyev; reviewed by jbellis for CASSANDRA-5554
fix memorySize bugs and cleanup
patch by Carl Yeksigian and jbellis for CASSANDRA-5564
revert CASSANDRA-5523
make BytesToken.toString only return hex bytes
patch by Juraj Sustek; reviewed by jbellis for CASSANDRA-5566
sstablescrub respects MAX_HEAP_SIZE
Patch by Mina Naguib, reviewed by brandonwilliams for CASSANDRA-5562
cqlsh: fix DESCRIBE after case insensitive USE

patch by Aleksey Yeschenko; reviewed by Brandon Williams for
CASSANDRA-5567
Update debian changelog date
Ninja-fix CQL3 version in CQL.textile
Write row markers when serializing schema

patch by Aleksey Yeschenko; reviewed by Sylvain Lebresne for
CASSANDRA-5572
Check only SSTables for the requested range when streaming patch by Rick Branson; reviewed by yukim for CASSANDRA-5569
Replace ArrayBlockingQuery by LinkedBlockingQueue in binary protocol RequestThreadPoolExecutor
snappy-java upgrade to 1.0.5
Fix NPE in Pig's widerow mode.
Patch by Sheetal Gorsani and Jeremy Hanna, reviewed by brandonwilliams
for CASSANDRA-5488
Merge branch 'cassandra-1.1' into cassandra-1.2

Conflicts:
	CHANGES.txt
Remove buggy thrift max message length option
patch by jbellis; reviewed by tjake for CASSANDRA-5529