JCB Fastrac 4000 Series v1.0.0.4

Changelog 1.0.0.4:
added Agribumper support
updated store/mod icon

Changelog 1.0.0.3:
updated decals
changed seat color options

Changelog 1.0.0.2:
updated engine option
updated color options
updated modDesc version
added new tire options

Changelog 1.0.0.1:
updated color options
updated modDesc
updated color option prices
added new engine option
added new nokian option
added reverse lights