Beta Trailerpack 0.4.0

The Jbeams still seem to have the quality like I've made them when I started modding. Oh well, most are now patched and functional.

• added a pickup config with gooseneck ("D35 V8 4WD Extended Cab Gooseneck (A)")
• strengtened the gooseneck jbeams
• added a gooseneck for the stepside and the 'short' bed (D10 etc)
• moved the gooseneck jbeam and flexbody from the common to the pickup folder
• moved the gooseneck hitch of the trailers a bit forward to increase the clearance a bit
• added a proper offroad suspension for the caravan (and a taller tongue jack)
• updated a lot of wheels
• patched the haybale wagon front suspension, it doesn't collapse that easy anymore
• updated the ramps
• updated the edges, also made them taller to prevent catching bumpers and wheels (still possible, careful!)
• widened the rotatable car hauler a bit (5cm on each side, so by 10cm)