Fix tags (allow creating new room whitout tags), hide tags list if empty. Hide rooms from the list when user is not a member.
Restrict publication of chatrooms to only room where current user belongs to.
Restrict access to individual chatroom where user belongs. Need to show error template when access not permitted or wrong room id.
Add error template for 404, add comments for todos.
Merge pull request #31 from paulld/restrict_room_access

Restrict room access
User can quit a chatrom he belongs to (but not the owner). Change file names from chatroom to chatroom_item to avoid confusion with the collection.
Fixed Leave Room visibility in chatroom.
Added packages.
Merge branch 'paulld-restrict_room_access'
Merge branch 'master' of https://github.com/lion-of-conquest/chattr