Merge pull request #2 from jurgendb/master

Refactoring; now supports configuration of clustering, stomp and shovels using defined types
Merge pull request #3 from jurgendb/master

Fixed spec tests; added puppet-concat to .fixtures.yml
Merge pull request #4 from jurgendb/master

Added rspec tests for rabbitmq::config::cluster and rabbitmq::config::stomp
Updated documentation