Inmerge and first new implementation of voltage and shutdown feature
Merge branch 'master' of https://github.com/oprobst/tdk-navi.git

Conflicts:
	src/main/java/de/oliverprobst/tdk/navi/gui/MapPanel.java
	src/main/java/de/oliverprobst/tdk/navi/serial/MessageType.java
	src/main/java/de/oliverprobst/tdk/navi/threads/DataProcessingThread.java