New in 0.42:
* Simple autopilot heading hold contributed by 
  Jeff Goeke-Smith <jgoeke@voyager.net>
* More code reorganization and clean ups.

New in 0.41:
* Many autoconf cleanups and tweaks
* make and make install work in unix
* make works for cygnus win32 (but not install yet)
* make dist now works
* added the Tools directory into the main source tree

New in 0.40:
* Gnu automake/autoconf/libtool make system
* Initial texture support
* Bug fixes