Austrian Narrow Gauge (760mm) IR Pack

Austrian Narrow Gauge V1.5 

Added:
- ÖBB class 699.1 with all 4 ever existed numbers, historically accurate and with a lot of detail and functions.
- Overhead electrified track
- Simple platform track (gravel elevation for better acces to train)
- Extra liveries on: Buffer 1, Gw/s 10220, Ci/s 3700
- Livery names in new livery menu
- Chuffing sound for the class 298

Changed:
- All brown colours of a certain shade of brown to the accurate colour.
- Some showing stock names
- Some json bits

Fixed:
- Z-fighting on Ci/s 3700's walls
- End-of-train signs on Ci/s 3700 and Bi/s 3600

Probably more but I forgor...

Note that the overhead wire is accurate to real life, but the pantographs don't go up to the proper height! This will be fixed along with the custom animations for the class 699.1. Due to this update taking so long and me going on vacation I am dropping this update so people can have a preview and maybe find buggs.