Add nodetool options to repair specific ranges.
Patch by brandonwilliams, reviewed by yukim for CASSANDRA-5280
Merge branch 'cassandra-1.1' into cassandra-1.2

Conflicts:
	CHANGES.txt
	src/java/org/apache/cassandra/service/StorageService.java
	src/java/org/apache/cassandra/tools/NodeCmd.java
	src/java/org/apache/cassandra/tools/NodeProbe.java