Edited the angle speed factor to make it more realistic.

Changed the texture for the ballast

Added ballastless tracks, they are slightly more expensive than the ones with ballast

Changed the angle speed factor to be higher on faster tracks (V>120 km/h).

Changed the angle speed factor to allow higher speed in curves

Corrected the absence of textures for the older light monobloc tracks

Changed the angle speed factor of the tracks with speed limits above 100 km/h

Typo correction in the mod file