Fix tunnel and sunken prefab not spawning trains issue

UPDATE 6 (10/13/2015)
Changed: Removed power lines poles

UPDATE 5 (9/30/2015)
Fixed: Now the mod works for Mac users too :)
Added: 'Station Track Sunken' asset for sunken stations

UPDATE 4 (9/30/2015)
Changed: Implemented new loading algorithm. It should be compatible with Network Extensions. And hopefully, it will work for everybody.

HOTFIX FOR UPDATE 3 (9/29/2015)
Fixed: Reverted back to original loading algorihtm. But it may be incompatible with Network Extensions.

UPDATE 3 (9/29/2015)
Fixed: Now compatible with Network Extensions!

Reverted back some experimental changes. Updated preview image.

UPDATE 2 (9/29/2015)
Fixed: Thanks to @Lazarus*Man, now the track now has custom mesh based on regular elevated track.

UPDATE 1 (9/17/2015)
Fixed: fixed elevated track texture and LOD. They will look much better now :)
Added: train station tunnel (highly experimental).

Alpha release