Changes:
* The directory structure and configuration scripts have completely changed
* RGB colors supported for color= keyword, pli, plf, plfp
see help,color or help,pli for more information
* lsdir, mkdir, rmdir functions added so yorick can read and
manipulate directories by itself
* i86_primitives and other modern binary formats added
see help,createb and help,__i86 for more information
* cheby.i, convol.i, dawson.i, kepler.i added to interpreted
library
* added "hex" 3D transport solver (similar to drat 2D solver)
* improved the emacs/yorick.el package again, mostly by removing
unwanted "improvements" to emacs; see emacs/README
8418abca7b