Graph builder: Support DEM files in GeoTIFF format
Complete Italian translation

Revise and translate missing string
minor fixes...
Better translation of some UI labels
fix #1605 (hangs on coincident nodes when intersecting unconnected areas).
Encapsulate router, workable demo code.
Encapsulate router, move pathService to Router.
Encapsulate routers, move tileRendererManager.
Encapsulate routers, move analyst services.
Encapsulate routers, move isochrone services.
Encapsulate routers, fix "old" isochrones.
Remove unused import.
Make OTPServer constructor first method.
Make GraphService private to OTPServer.
Remove GraphService ref in TravelingSalesmanPathService.
Move SPTServiceFactory to Router.
insert nodes from parking lots into ways. #1605.
Revert "insert nodes from parking lots into ways. #1605."

This reverts commit 33334ef95698c918cea547ab85dbc838aa3dd8c5.
Revert "fix #1605 (hangs on coincident nodes when intersecting unconnected areas)."

This reverts commit afaf9e446793267da1243d7f44f4c1f775c30c74.
simpler fix for #1605, thanks @laurentg for the suggestion.