Fix create chat room.

1) Add wasNew reference in RoomSchema middleware pre save.
2) Update RoomSchema middleware post save to reference wasNew instead of
isNew.
Fix get room message.
Change the RegExp to including start and end character.
new RegExp('^'+params.search+'$', 'i')
Fix subscribe room then send message show 'underfined' problem.
Add joinRoom function inside create bookmark function.
Indicate message from current login or other user
Merge tag '01muc_201410071000'