add RoutingService

Conflicts:
	graphhopper/pom.xml
introduce routing service selection

Conflicts:
	download/src/main/java/slash/navigation/download/DownloadManager.java
	route-converter/src/main/java/slash/navigation/converter/gui/RouteConverter.java
	route-converter/src/main/java/slash/navigation/converter/gui/dialogs/OptionsDialog.java
fixes after merge