Traffic density and speedlimits for 1.30

More traffic on motorway, less on local road.
Added SCS tractor and harvester on local roads, work time 5 to 21, can go to cities, I can't fix this problem now.
Increased length for cargo trains (a bit)
Increased lenght of DLC France tram
Added sound cargo train: diesel and electric
Added sound for passenger trains + tgx and tram.