Fix cqlsh deserialization of blobs

Patch by Tyler Hobbs; review by Aleksey Yeschenko for CASSANDRA-7603
update CL archive comments post-6905
Merge branch 'cassandra-2.0' into cassandra-2.1.0
Use "keyspace updated" message for UDT changes in v1/2 protocols

Patch by Tyler Hobbs; review by Aleksey Yeschenko for CASSANDRA-7617
Fix tracing of local portions of range slices

Patch by Tyler Hobbs; review by Brandon Williams for CASSANDRA-7599
initial commit
fixing directory push
adding .bat files, add call to debug-cql.bat