Merge pull request #32 from probepark/master

#31 fix a bug in DeleteBuilder
refactoring and update cassandra driver
add async api on Cassandra
add create keyspace options
refatoring the class name
name of test
add custom collection
new test to complex collection
Added bundle plugin to create OSGi manifest data
Merge pull request #33 from siwatson/master

Added bundle plugin to create OSGi manifest data