share most files. Repository copy the default to explicitly named
directories to avoid any confusion. Greatly simplify the shared
Makefiles, since we are now in different subdirectories, we don't need
"a4-install" stuff.
While I'm here, consistently name the variables. Here are the
guidelines (master port is in brackets)
DOCFORMAT: [html] pdf ps
KONFONT: 14dot [16dot]
PAPERSIZE: a4 [letter] letterdj
RESOLUTION: 118 240 [300] 360 400 600
"math/r" has been copied to "R-a4" and "R-letter", to follow the
spirit of the original port. "japanese/kon" is renamed to "kon2-*",
since that seems to be the basename.
