Move sstable level information into the Stats component
patch by Marcus Eriksson; reviewed by jbellis for CASSANDRA-4872
Revert "Move sstable level information into the Stats component"

This reverts commit 0e284787294221982d21c17b27c0a4e1ae0971e7.
trying again to commit #4872 via git apply
Fix stress with CQL3
Merge branch 'cassandra-1.2' into trunk
cqlsh: Add username autocompletion

patch by Aleksey Yeschenko; reviewed by Brandon Williams for
CASSANDRA-5231
Merge branch 'cassandra-1.2' into trunk
don't report harmless cache read problem as debug, don't rely on FileInputStream.available to always return > 0
patch by dbrosius reviewed by mkjellman for CASSANDRA-4916
Merge branch 'cassandra-1.2' into trunk
add missing break