Merge pull request #26 from boneill42/master

Explicit consistency levels for batches, cluster, and conditional updates.
Add 0.2.0 CHANGELOG
[maven-release-plugin] prepare release storm-cassandra-cql-0.2.0
[maven-release-plugin] prepare for next development iteration
Updating to QUORUM as default (and in tests)
Kudos to @bflad, he was right.
Don't try to run LOCAL_QUORUM against a single node. =)