fix embedded C* range slice tombstone identification
Added concurrent read test to make sure that the Buffer underflow issue is solved.
Merge branch 'titan03' of github.com:thinkaurelius/titan into titan03
Enabled proper vertex iteration for BoP Cassandra backend. Fixes #258
Made StandardIDPool more robust and configurable. Added additional test cases to verify and extend coverage. Fixes #242
Added additional test case to StandardIDPool to check for correct failure
Increased concurrency level of LockKCVSTest
Added option to have Embedded store manager sleep for a configured number of ms to give the cluster a chance to settle in before attempting any operation against it. Fixes #236.
Remove RexsterTitanClient and related tests #257.

This mode of connectivity is no longer needed given RexsterClient libraries.
Add ext directory to drop extensions for titan server into the classpath.
Get titan.bat working with new ext directory for extensions.
Refactored operation robustness handling and retry. Added retry check for initial backend operation. Improved error messages. Fixes #236.
bumped to Frames 2.3.1.
Refactored BackendOperations into a separate class. Improved error/log messages.
Increased test coverage in LockKeyColumnValueStore - currently does not pass for thrift!
Merge branch 'titan03' of github.com:thinkaurelius/titan into titan03
Added utility method for cleaning out a Titan graph
added new util package to Imports for Gremlin.