- changes to stablize osx compile/run using fink
- README.md updated with notes for fink setup
- Makefiles/make.def changes to simply not compile the dacq4 subsystem
  unless you're on a linux machine.
- pype changes are minor
- sprite.py -- *important* SDL_VIDEODRIVER=x11 is forced for darwin. The
  reason for this is that keyboard/mouse io only appears to work with
  the X11 driver using fink's version of pygame. This is not true for
  macports, but macports has other problems (tkinter-related).