Improved Train Sounds v2.11 1.38.x

This mod replaces the standard trains sounds in ATS with improved versions.

As of game update 1.5, the new "AI" trains will now spawn with a minimum of 12 rolling stock (value may increase in the future).

Changes v2.11:
- Update for 1.38;
- Adjusted Safe Distance parameter to (hopefully) help trains spawn a bit more.