Fix json2sstable handling of range tombstones

patch by Lyuben Todorov; reviewed by Aleksey Yeschenko for
CASSANDRA-6316
Fixing missing one row during reverse query on compact tables

patch by slebresne; reviewed by iamaleksey for CASSANDRA-6330
Merge branch 'cassandra-1.2' into cassandra-2.0

Conflicts:
	src/java/org/apache/cassandra/cql3/statements/SelectStatement.java
	src/java/org/apache/cassandra/tools/SSTableImport.java
Fix missing results on query with IN clauses

patch by slebresne; reviewed by iamaleksey for CASSANDRA-6327
Fix build
Fix reading expired row value from row cache
patch by jbellis; reviewed by Mikhail Stepura for CASSANDRA-6325
Merge branch 'cassandra-1.2' into cassandra-2.0
Improve Gossip tolerance of abnormally slow tasks
patch by jbellis; reviewed by jasobrown for CASSANDRA-6338
Fix paging with reversed slices

patch by slebresne; reviewed by iamalesksey for CASSANDRA-6343
Set minTimestamp correctly to be able to drop expired sstables correctly

patch by marcuse, reviewed by jbellis for CASSANDRA-6337
add deprecation warning to cli
Follow-up for 6327

patch by krummas; reviewed by slebresne for CASSANDRA-6327
Fix AssertionError when doing set element deletion

patch by slebresne; reviewed by iamaleksey for CASSANDRA-6341
Merge branch 'cassandra-1.2' into cassandra-2.0
Make the CL native protocol code match the on in 2.0

patch by slebresne; reviewed by jasobrown for CASSANDRA-6347
Merge branch 'cassandra-1.2' into cassandra-2.0

Conflicts:
	src/java/org/apache/cassandra/db/ConsistencyLevel.java
Recover from IOException in accept() thread
patch by Mihial Stepura; reviewed by jbellis for CASSANDRA-6349
free off-heap IndexSummary during bulk load
patch by Tyler Hobbs; reviewed by jbellis for CASSANDRA-6359
Cancel read meter task when closing SSTR
patch by Tyler Hobbs; reviewed by jbellis for CASSANDRA-6358
Invalidate row cache when dropping CF
patch by Fabien Rousseau; reviewed by jbellis for CASSANDRA-6351