Update offline scrub for 1.0-> 1.1 directory structure
patch by Omid Aladini; reviewed by Marcus Eriksson for CASSANDRA-5195)
merge from 1.1
Merge branch 'cassandra-1.2' into trunk
newer 5195 patch
Merge branch 'cassandra-1.1' into cassandra-1.2
Merge branch 'cassandra-1.2' into trunk