ZXing dep added
First sharing attempt
Removed ZXing, using android sharing for now
Stuff
Merge branch 'feature/QRCodeRouteSharing' of https://github.com/HappyCarl/geotown.android into develop

Conflicts:
	app/src/main/java/de/happycarl/geotown/app/gui/RouteDetail.java
Fully Merged.
Implemented handling of geotown.de routes (should we buy this domain?)
Optimized sharing string.
Renamed routeDetailActivity
Implemented back Button for Route Detail
Setting the action bar title according to the routes name.
Changed the name of the route detail activity for users.