add log reader, add observer pattern to MaintenanceState
javadoc angepasst, log Message angepasst
code style
Merge branch 'master' into logreader

Conflicts:
	src/main/java/ch/zhaw/id5848/parkingmeter/view/GUIImage/ParkingGuiBackground.java
	src/main/java/ch/zhaw/id5848/parkingmeter/view/ParkingGui.java
	src/main/java/ch/zhaw/id5848/parkingmeter/view/TicketPrinter.java
regenerate GUI code
change file encoding for properties files to ISO8859-1
Text anzeige überarbeitet
Parkzeit wird angezeigt
fix tests
Merge branch 'logreader'