Removed foreign key contraints on history tables in order to prevent constraint violations on delete
Removed the references to the 'active' column now removed
Integrity check for the existence of a room before joining it
Returning now also the user_id when retrieving the users connected to a room
new_room_id should be null by default
Style fixes on the users list
Allowing createUrlFromArguments to create a URL also if no arguments are passed
Removed the reference to # for the brand link
Including the user_id as data attribute in the users list
Supporting message broadcasting to all the users in the room when a user logs in or out