Released LibOSM 2.0 and Traveling-Salesman 0.3

Today we could finally test the new Versions against the OpenStreetMap-server and release them to the public.
LibOSM2.0 is named 2 because with the OSM0.5-API it is not incompatible with the 1.x-releases.
Traveling-Salesman and osmnavigation made some huge improvements are will go to beta shortly (after some missing features are added).