changed type of userlist from vector to set
QSettings eingebunden
merge
client cleanup
Slot in main-function fuer logout-Funktion verbunden
merged
cleanup
added class ChatWin. For connecting Signals and Slots for Login and other Client Windows
Register and Login via Welcome-Window
Bugfix for Register via WelcomeWindow
Leave Chat implemented
Bugfix regarding signature
Merge pull request #21 from sepm-depm/ChatManager

Chat manager