fonts and whether US or A4 paper for GDB refcard; (refcard.dvi)
collect sed edits if any, apply to refcard before formatting;
(refcard.ps) stop implying PS fonts if PS output requested;
(lrefcard.ps) delete extra target for variant PS fonts
* refcard.tex: parametrize papersize dependent info, collect
in easily replaced spot
* a4rc.sed: new file, edits to refcard for A4 paper
