Attempting to fix track glitch

Moved/Improved city station, added area portal for yard/mountain transition, converted all curves to props for performance, replaced some building platforms with areaportalled garages

Lets try this again

Fixed a few visual glitches

Improved switches, Increased track spacing for curves, divided center of map into two parts with areaportals

Extended Roads, added scenery, moved autorailer, added more loops of track

Fixed track being too thin at certain spots, fixed the All-or-Nothing switch in the yard, added a crude lumber mill with areaportalled doors