Changes in the enter and leave room methods, in order to support the new
prosedure of changing rooms.
Minor changes
-mkRoom stuff I gladly announce, that I do not longer use this bad
implementaton, so it could be removed.

I also uncommented rmRoom, because there is no such functionality at
this point.
minor code Changes
Changes in the enter and leave room methods, in order to support the new
prosedure of changing rooms.
movebtn got an actionlistener which is now in this class again ^^ and i
added some if(stuff != null) to get rid of unwanted exceptions.
Just derped around for testing
Changed the behavior of creating a RoomPanel, and handeling it in a very
radical way! And than, the send button got a lot of if and else stuff to
show if something was not sended.
Client got a whole new implementation of how to handle an info message.

Signed-off-by: Erik Heinisch <Imkerixus@gmail.com>