Created train routes and route_master for Newark-Grimsby train route. Also updated some tags.
Updated track and sidings around Newark North Gate station.
Added stop point for Newark North Gate Platform 3.
Updated Swinderby station to new public_transport tagging scheme (legacy scheme retained).
Updated Hykeham station to new public_transport tagging scheme (legacy scheme retained).
Updated Market Rasen station to new public_transport tagging scheme (legacy scheme retained).
Updated Barnetby station to new public_transport tagging scheme (legacy scheme retained).
Added route master for Barton Line train route.
Updated Barton-on-Humber station to new public_transport tagging scheme (legacy scheme retained).
Updated Barrow Haven station to new public_transport tagging scheme (legacy scheme retained).
Updated New Holland station to new public_transport tagging scheme (legacy scheme retained).
Updated Goxhill station to new public_transport tagging scheme (legacy scheme retained).
Updated Thornton Abbey station to new public_transport tagging scheme (legacy scheme retained).
Updated Ulceby station to new public_transport tagging scheme (legacy scheme retained).
Updated Habrough station to new public_transport tagging scheme (legacy scheme retained).
Updated Stallingborough station to new public_transport tagging scheme (legacy scheme retained).