Ex8000 and updated Terrafarm

EX8000 and Terrafarm Updated 4.0 added vehicles from various authors redone and put in by category for new added items.
Ex8000 has bucket options now
Higher Cost
Longer life 720 instead of normal 600
**Terrafarm includes following added nothing changed to base file V4 Terrafarm

4MR Machines Cat
Cat 992
Cat 994
Cat 6015B

Ashland Scraper

Hitachi
4MR 2600
4MR 470
4MR EX8000
Hitachi 350LC Telescope

Liebherr 9800

NMC D11

EC950 Bucket