Solar Battery Script

!!!Script needs to be installed manually to vehicles!!!

Adds ability for a vehicle to only work if solar power is active, else switching to battery.
Battery has a defined lifetime. If lifetime is reached, motor turns off and recharges when sun is back.

Instructions to modify settings, are within lua-file.

Changelog:
1.0.0.1
- fixed updateMass value (vehicle was too heavy to drive)
- added xml-value to set fillUnitIndex of "Diesel"-fillUnit if it differs to 1