Beta Gavril D-Series addon by AR162b 0.8.4

Updated and fixed lots of issues:

Removed:
My version of the D45 chassis
My version of the rollback upfit
'My' version of the ambulance
Configs: prerunners, stations

Hidden (files still exists but are not updated and/or not in current configs):
My version of the prerunner parts (rear suspension, TTB, TIB, upfit, wide fenders etc)
Station wagon body

Updates:
Lots of flexbodies and mappings
Barstow engine
configs
suspension updates
lots of things I forgot

New:
Twin traction beam for the new prerunner chassis
Facelift wigwags front and rear lights
configs: new oldstyle prerunner, oldstyle sleeper, oldstyle longbed, facelift sherrif

Todos:
update material on the TTB and TIB (still uses old mappings)
Maybe the station body (lots of work)
Maybe the rollback (lots of work, official version exists now)

If you encounter bugs please be constructive.