fluo-io/fluo — pull request #157 by mikewalch (2014-08-28 22:48:38+00:00)
Title: Closes #8 - Made garbage collection iterator determine oldest active snapshot.  

Pull request for #8

Created TimestampTracker to keep track of timestamps in Zookeeper. Modified GC iterator to get oldest active timstamp from Zookeeper. Created integration tests for TimestampTracker and GCIterator