                                                     7/13/97 jpb
Things to do for HF-Lab:

* Clean up Makefile
* Incorporate DEM-reading code (?) (decided this was better done externally)

* Put in a nice GUI.

(This last one seems daunting... one problem is there are too *many*
interfaces for Unix... should I use Tcl/Tk, Xforms, Qt, FL, ...? Accept the
code bloat/ memory overhead of Mesa/OpenGL for greater preview and display
flexibility?  hmmm...)
