[fix] Do not allow broadcasting messages with ack
[test] Adding not allowed ack test
[feature] Adding except method for brodcasting
[feature] Adding isRoomEmpty method
[fix] Small fix
[feature] Adding isRoomEmpty method to server
[doc] Documenting isRoomEmpty and except
[feature] Adding except method to server
[doc] Documenting except on the server
added getRooms
Merge pull request #19 from Dshankar/master

added getRooms
[feature] Adding primus.rooms method
[doc] Adding primus.rooms documentation
[fix] Small fix
[fix] Small correction
[minor] clients method refactoring
[minor] primus.isRoomEmpty change
[test] Some minor changes
[test] Some minor changes
[release] 2.2.0