Montana Expansion v0.2.6

v0.2.6 -
fix invisble walls at new interchanges on I15 in Great Falls -
added Billings improvements -
forest road to Lewistown lumbermill fixed -

v0.2.5 -
3rd I15 interchange in Great Falls re-built along with alot more terrain pieces removed -
Billings improvements -
Scale triggers exiting Billings scale corrected -
Speed limit on I90 in Billings now 65 all the way through on the interstate -
dozens on needless terrain pieces removed from Billings -
buisness added for Forsyth -
company not inside city limit corrected (was the new Kalispell truckstop) -

v0.2 -
re-built 2 I15 interchnages at Great Falls -
Billings and Lewistown work -
removed dozens of needless terrain pieces in Great Falls -

v0.1.9 -
Replaced 2 truckstops with 1.37 texture problem -
Signs added in Billings, Missoula and JCT US87/MT200 (Grassrange)
various terrain fixes