Fix ColumnFamilyStoreTest, NativeCellTest, SSTableMetadataTest unit tests on 2.1

Patch by Benedict Elliott Smith; reviewed by Michael Shuler for CASSANDRA-7201
Merge branch 'cassandra-2.1' into trunk
Fix CellName comparison bugs

Patch by tjake; reviewed by bes for CASSANDRA-7227
Followup commit to fix maven deps on boundary's NBHM for CASSANDRA-7128
Merge branch 'cassandra-2.1' into trunk
Add PowerShell Windows launch scripts
patch by Joshua McKenzie; tested by Philip Thompson for CASSANDRA-7001
Merge branch 'cassandra-2.1' into trunk
Close java driver Cluster in CQLRR.close
patch by Mariusz Kryński; reviewed by jbellis for CASSANDRA-7228
merge from 2.0
Merge branch 'cassandra-2.1' into trunk
Add server side batching to native transport

Patch by bes; reviewed by tjake for CASSANDRA-5663
Merge branch 'cassandra-2.1' into trunk
Exclude xerces to fix hadoop build issue.

Patch by Sam Tunnicliffe, reviewed by brandonwilliams for CASSANDRA-6877
Merge branch 'cassandra-2.0' into cassandra-2.1
Merge branch 'cassandra-2.1' into trunk
Fix pig tests.

Patch by Alex Liu, reviewed by brandonwilliams for CASSANDRA-6877
Merge branch 'cassandra-2.0' into cassandra-2.1
Merge branch 'cassandra-2.1' into trunk
Make batchlog replay asynchronous

patch by Oleg Anastasyev; reviewed by Aleksey Yeschenko for
CASSANDRA-6134
Merge branch 'cassandra-2.1' into trunk