Disabled the Dvorce city. It collides with a stop in Prague.
Fixed Google directions so it does not crash with German trains

If vehicle type is not given, vehicle "name" (e.g., "Long distance
train") is used instead.
Merge pull request #31 from UFAL-DSG/fix_german_trains

Fixed Google directions so it does not crash with German trains
wrapping main of add_cities_to_stops
wrapping main of add_to_bootstrap
wrapping main of prepare_data
fixed rest of missing main()'s
Merge pull request #32 from UFAL-DSG/lz_fix_docs

Fixing sphinx documentation generation
Merge branch 'master', remote-tracking branch 'origin' into ptics_live