fix binary incompatibility with cassandra 1.2.6
fix for issue #372
Merge pull request #373 from opuneet/issue372

fix for issue #372
Merge pull request #353 from tsachev/master

fix for issue #352
Using withAtomicBatch() instead of a separate method in the interface
Merge pull request #374 from opuneet/issue328

Using withAtomicBatch() instead of a separate method in the interface