Col de Vence V1.7

Dear Assetto's racer and chiller,

Here the Col de Vence, a stunning mountain road of the french riviera which offers fast, flowing corners and tight hairpin.

I've also included the hillclimb race which is organized on this road.

Here is the future fix for the next update :
- addition of texture for all empty road signs
- addition of sound reverb parameter
- addition of traffic lines