cnc-bike cost; minor changes to vehicles.

Humvee HP increased 150 -> 160, to justify its higher cost compared to Nod buggy.
Bike cost increased 400 -> 500 (original C&C value)
Stealth Tank cloak delay lowered 125 -> 80 (closer to C&C original value) 
Stealth Tank crushes crate + infantry (original C&C behavior)
Flame Tank now has its flamers wider apart from each other
Changed selection bounds for htnk, mtnk, harv
corrected MCV BuildPaletteOrder