Various RA/TD mod shp fixes

- fixed non-remapable pixels on idle airfield.
- removed green pixels from interior mine.
- compressed several previously uncompressed shps in ra/bits, shaving off a few hundred KB of space and possibly some milliseconds of loading time, too.

- compressed several previously uncompressed shps in cnc/bits, shaving off a few hundred KB of space and possibly some milliseconds of loading time, too. hclock.shp was brought down from 333 KB to ~10KB, apcmuz and apc turrets saw a massive shrink as well.