Gavril T-series addon v0.5.1

• added the hay bale material
• fixed the silo material
• updated the 2 axle dolly to have a 'real' fifth wheel
• added a single axle dolly with fifth wheel
• Made the dollies a separate vehicle
• updated the lead trailer frame
• updated the heavy duty tow hitch
• added a reinforcement option for the flatbed to be able to carry more weight
• copied the container skins to the skeleton containers to have more container colors available
• fixed the car lift
• updated some semi...

finally updated and fixed many jbeams.
Added
- stretched flatbed trailers, with a silo and a windturbine blade
- steel coil load for the flatbed
- lots of small stuff

Updated lots of stuff, added new flatbed options

Fixed the dryvan based car lift for the semi. A lua file was missing.

Expanded the mod;

separated container, flatbed/hayhauler trailers
added dryvan trailers
added bogies, dollies
added container prop
updated the semi race parts
added dryvan based straight truck
...

Updated jbeams
Added scenario