FSF preferences (format definitions, nee threecol.tex, and
default font defs, nee rc-cm.tex, now both directly in this file).
lpsrc.sed, psrc.sed: alternate font defs, now sed scripts to modify refcard.tex
Makefile.in: use sed -f psrc.sed to produce refcard.ps target; new
target lrefcard.ps for sites using long PS font names
Removed old auxiliary TeX files, no longer necessary with this scheme.
(2) Reorganized, bringing more common commands forward, merging
"print" and "x" into one section;
(3) New sections: "Essential Commands", "GDB Scripts";
(4) Material on convenience vars and value history added to "Expressions";
(5) Uses PostScript fonts by default, also includes (commented out) alternative
Computer Modern font definitions that format similarly.
