Updated bus route #16312553

Add missing routes to route masters

Updated bus route #8335673

Fix gap in MBTA Bus 504 outbound route

Updated bus route #8330991

Updated bus route #8272035

Updated bus route #16304691

Updated bus route #8329011

Updated bus route #8329010

Updated bus route #8329009

Split SL4 into inbound/outbound routes and adjust members to match

Split SL3 into inbound/outbound routes and adjust members to match

Reordered ways for MBTA Bus SL2 to reflect single-direction PTv2 routes

Fix operator:short=MBTA tag on previously normalized routes (was incorrectly set to GATRA)

Clone MBTA SL2 in preparation for splitting into inbound/outbound

Set GTFS Route ID on MBTA Bus 504

Reordered ways for MBTA Bus 504 to reflect single-direction PTv2 routes

Set network and ref on 77A route while I figure out if they've been replaced or eliminated

Normalize network and GTFS feed tags on routes and route masters that I recently worked on

Fix incorrect GTFS Route ID on SL1 route master