Expanded test cases in TestSqlAggregateSuite. As I sit here and write my dissertation, I just want to be sure that we actually support the things that I'm writing about...
Uncommented working test cases in TestPlansGroupBySuite
Uncommented working test cases in TestPlansGroupBySuite
Minor tweaks to the HStoreCoordinator.sendHeartbeats() so that it doesn't freak out when it tries to send heartbeats when we're shutting down...
Workarounds for problems with GROUP BY on views #137