Add missing networks in-game

Fixed compatibility with Trains CCP and Airports DLC

Added support for 'Tram Station Track Sunken'

UPDATE 16 (5/18/2017)
Fixed: Updated for C:S 1.7 a.k.a. Mass Transit

UPDATE 14 (12/17/2016)
Fixed: Removed phantom tram tab in-game.
Added: Added support for Metro Overhaul.

UPDATE 13 (10/31/2016)
Removed: 'Make all segments editable' and 'Bulldoze Pedestiran connections' buttons from asset editor panel. They are now part of Advanced Buildings Editor

UPDATE 12 (7/11/2016)
Added: Allow to place quays and canals in asset editor (paths tab).
Added: Allow to PgUp/PgDown, bulldoze and edit with Network Nodes Editor ped. connections. Also a tip: did you know you can upgrade a pedestrian path to ped. connection with upgrade tool (one you use to upgrade roads)?

Added 'Tram Station Track' to asset editor networks.

UPDATE 10 (6/10/2016)
Fixed: Fixed 'Distance too short' issue for stadium by not allowing placing ped. connections in-game