initial stab using java-driver 2.0
* broken tests, deps from java-driver do not seem to like
  cassandras (guava 15.0 vs 13.0.1)
Merge branch 'master' into 2.0

Conflicts:
	project.clj
Merge branch 'master' into 2.0
do not encode Keyword instances to strings anymore
update tests
prepare for release
fix storage port
Merge branch '2.0'