cqlsh: fix DESCRIBE after case insensitive USE

patch by Aleksey Yeschenko; reviewed by Brandon Williams for
CASSANDRA-5567
Merge branch 'cassandra-1.2' into trunk
Update debian changelog date
Ninja-fix CQL3 version in CQL.textile
Merge branch 'cassandra-1.2' into trunk
Ninja-fix CQL3 version in CQL.textile
inline variable c2
accept simple iterator where closeable-ness is not needed
inline ISSTableColumnIterator -> OnDiskAtomIterator
inline AbstractColumnIterator
inline SimpleAbstractColumnIterator
simplify de-tombstoning of columns for pre-collated results
inline some synonyms of timestamp that no longer make sense as distinct concepts post-supercolumns
Slightly simplify/optimize columns collation
Write row markers when serializing schema

patch by Aleksey Yeschenko; reviewed by Sylvain Lebresne for
CASSANDRA-5572
Merge branch 'cassandra-1.2' into trunk

Conflicts:
	CHANGES.txt
	src/java/org/apache/cassandra/config/CFMetaData.java
Check only SSTables for the requested range when streaming patch by Rick Branson; reviewed by yukim for CASSANDRA-5569
Merge branch 'cassandra-1.2' into trunk

Conflicts:
	src/java/org/apache/cassandra/db/ColumnFamilyStore.java
inline maxChange
move QF.isRelevant into CF.addIfRelevant