Dump trailer PST-9 v1.0.0.2

Dump trailer PST-9 with capacity configuration for Farmer Simulator 2019.

Changed in 1.0.0.2:
- Changed the collision of the trailer;
- Added dark green color;
- Added a choice of decal colors;
- Minor edits.

Specifications:
The ability to customize the color (main, frame, discs and boards);
Three body options with different capacities (10,500, 12,500 and 17,500 liters);
Two wheel options: Belshina, Kf-97;
PST-9 gets old and dirty;
There are dynamic hoses;
Log without errors.