added logout, improved UI
Modified Files:
src/java/de/fhworms/ztt/ox/examclient/ExamClientApp.java
src/java/de/fhworms/ztt/ox/examclient/ExamClientChangeListener.java
src/java/de/fhworms/ztt/ox/examclient/ExamClientController.java
src/java/de/fhworms/ztt/ox/examclient/ExamClientModel.java
src/java/de/fhworms/ztt/ox/examclient/ExamClientView.java