Merge pull request #1 from arlolra/bus

Always add body.
Start with 0.5 s retry delay
Use fresh node-cassandra-cql 0.3.0 release
Merge pull request #2 from arlolra/config

I'll merge your 'one' version and add a comment about quorum in a follow-up patch.
Some cleanup.

Fixes a bug in CassandraRevisionStore.js where, on callback from
client.execute, `this` isn't bound to the store and consistencies can't
be read.