More work on visualizations.
Added passenger highlighting.

Added passenger highlighting for the advanced route visualization.
Removed passenger from options.
Added line & route goal colors.
Added passenger visual to basic line.
Fixed a naming logic error.
Added node highlight for basic route + passenger.
Simplified basic line edges for passenger.
Changed passenger edge color to blue.
Version bump.
Updated route to be observable.

Also removed a lingering pry statement.