1.9.M05 (2013-03-05)
--------------------
o Election happens for all roles when an instance comes online
o Snapshots are no longer received automatically on cluster join
o Instances starting concurrently will now discover each other instead of each starting
  their own cluster
o Acceptor store now does not grow unbounded and is garbage collected
o Learn requests are made towards and responded from all cluster members
o Cluster server will now by default bind to all interfaces (0.0.0.0)

1.9.M04 (2013-01-17)
--------------------
o Warning is now printed if an instance that is not part of ha.initial_hosts tries to join the cluster
o Snapshots are now prunned when received during cluster joining
o Logging cleanup

1.9.M02 (2012-11-30)
--------------------
o Moved shared logic, commonly refered to as cluster client into a ClusterClient class.
o Reduced amount of threads used by Paxos by using fixed size thread pools
o Paxos cluster membership management imporoved by introducing memberIsUnavailable and cleanup of roles
o allow_init_cluster setting is now respected

1.9.M01 (2012-10-23)
--------------------
o Initial release
