Gamer!'s Ultimate Pickup Parts 1.15.1

This update is mainly a hot fix, but it also adds:

- 2 new spraypaint skins
- 6x6 leaf spring rear and rear rear suspension in regular and heavy duty, including trailer suspensions
- removed loading screens after request from mod approval team (which does reduce the file size)
- updated most of the lights to the new halogen light system
- added 7 more offroad tires for the big 8-lug dually 19.5 inch wheels
- added 3 new configs
- fixed broken textures on demountable hub wheels on T-series and MD-series
- reverted exterior rollcage strength to previous values (1.10)
- fixed goliath 6x6 rear rear dually hubs rotating around wrong axle
- fixed worng position of axle bracing on goliath 6x6 rear suspension
- various other fixes


We are also about to hit 500k total downloads, so to celebrate this I added another skin and config, this time it's a slammed long bed with a V12

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