Added GUI-Class
Merge branch 'master' of https://github.com/tgm-mritter/Verschluesselung
Merge branch 'master' of https://github.com/tgm-mritter/Verschluesselung
GUIAuswahl Class added.
Changed name from "GUI.class" to "ShiftCipherGUI.class".
Added simple GUI ShiftCipher.
Added KeywordGUI class.
Fixed NullPointerException at ShiftCipherGUI