1.0.1.0 Update

Giants Engine doesn`t allow to bend rigged objects so i had to make sloped tracks work another way, it`s not perfect but it works. 

I wouldn`t recommend going more than 5 degree slope because it will get really bumpy and locomotive collision will hit the track.

I've added bridge. You can place like this: 
bridge end<->middle section (as many as you want)<->bridge end. 
Collision is extended so you can add one section after another in the air.

Changelog:

1.0.1.0

-adjusted clear area and gravel area, prices
-added retractable tracks for slope max 5 degree
-added bridge