Shenzong stats and spawning frequency updates.
sync to svn head -r12061
Removed typo'd comma from "Shizu.civvie,"
Number of selectable difficulty levels reduced to reflect heavily tested range.
added 2560x1600 resolution
additional options for mesh converter
fixes for OS X 10.2
fixed velocity readout
Fixed autopilot to very fast orbiting starbases (i.e. greater than limiter)
fix for a few NAN bugs