wingman-table.jinja: fix pilot's name and show co-pilot too, if available
wingman-table.jinja: show aircraft model in aircraft column

Add CN and Reg if available
wingman-table.jinja: add schema.org itemtype to table
templates/flights: enable tooltips
model.flight: limit flight_path_chunks total points to 3000 per flight

Our server can't handle more at the moment...
skylines.app: add cache to the pure SkyLines app
model.flight: add time_modified to Flight.__repr__
model.flight: cache flight elevations for 24 hours