Removed disconnect because only server will use it and it makes more
sence in server then.
Made StreamTools private and changed everywhere from .st to .getSt()
Changed the disconnect Protokoll, in order to throw no exceptions, added
a call of rmClientFromRoom to the disconnect method and changes stuff
related to changes somewhere else.
Changed stuff related to other changes
Made the Send button pressable by enter, and tweaked a few little thing,
like codestyle and formatting.
just derped around for testing.
Changed the disconnect behavior, the Server now replys first and than
disconnects, what allowes the client to jump out of his read forever
thread.

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