Improved Login
Added FoodList request
Merge branch 'master' of https://github.com/KrasseKoder/MensaManager2013Client.git

Conflicts:
	src/main/java/com/github/krassekoder/mm13client/gui/MainWindow.java
	src/main/java/com/github/krassekoder/mm13client/gui/TellerWidget.java