added parameter broadcast_address
Merge pull request #9 from pawelmiszcz/master

Add parameter broadcast_address
Move default value for broadcast_address into cassandra::params

Apart from being consistent with the other configuration parameters it also
enables overriding the broadcast_address setting with a global variable
$cassandra_broadcast_address.
Update README.md
Update Puppet versions in Travis CI build config
Update Modulefile for releasing version 0.4.0
Fix typo in README.md
Add Ruby 2.0.0 to Travis CI test matrix
Remove incompatible settings in cassandra 2.0