Fix another null value bug in the datastore. See DataStoreSuite.TestNullValues for more details
fix #55. Limit should limit the points that match the Where clause
fix #53. Writing null values via HTTP shouldn't fail
remove release candidate when deciding the next version
update the changelog.
fix typo in content-type header
Merge pull request #58 from smn/master

fix typo in content-type header
add test for issue #58
Close #57. Return error instead of panic when type of time != float
first and last shouldn't be special tokens
formatting (only whitespace changes)
fix #51. Implement first and last aggregates
clean up the aggregators
* Fix IsSingleServer to return true when it's actually single.
* Move ReplicateWrite to live only on Coordinator.
* Change SequenceNumber on Point to be a uint64 to support higher numbers and host ids being the first part of it.
* Move time and sequence_number assigning to the coordinator instead of in the datastore.
* Roll RequestLogging and PersistentAtomicIncrement into the Datastore interface.
* Add PersistentAtomicIncrement to LevelDbDatastore to support non-colliding sequence numbers.
Merge branch 'master' into add-clustering