Merged the functionality of gitsch2ppm into schhist2web.

- scripts/normalizeschps: don't edit in place and thus become capable of
  running in a pipe
- scripts/schps2ppm: considered - to be an option and thus didn't accept
  it as input file name
- scripts/schhist2web: open-coded functionality of "gitsch2ppm"
- scripts/gitsch2ppm: removed

scripts/schhist2web

@@ -190,18 +190,25 @@ for n in $first `cd "$dir" && git rev-list --reverse $first..HEAD`; do
 	echo Name change $schname to $new 1>&2
 	schname="$new"
     fi
-    trap "rm -rf \"$cache/ppm_$n\" \"$cache/fat_$n\"" 0
+    tmp=`pwd`/_schhist2web
+    trap "rm -rf \"$cache/ppm_$n\" \"$cache/fat_$n\" \"$tmp\"" 0
     if [ ! -d "$cache/ppm_$n" ]; then
-	rm -rf "$cache/ppm_$n"
-	mkdir "$cache/ppm_$n"
+	rm -rf "$cache/ppm_$n" "$cache/fat_$n"
+	mkdir "$cache/ppm_$n" "$cache/fat_$n"
 	#
 	# potential optimization here: remember Postscript files from previous
 	# run (or their md5sum) and check if they have changed. If not, skip
 	# the ghostscript run and just put a symlink, replacing the less
 	# efficient optimization below.
 	#
-	gitsch2ppm $sanitize -k "$dir" "$schname" $n "$cache/ppm_$n" || exit
-	gitsch2ppm -c -w 500 "$dir" "$schname" $n "$cache/fat_$n" || exit
+	gitsch2ps $sanitize  "$dir" "$schname" $n "$tmp" || exit
+	for m in "$tmp"/*.ps; do
+	    ppm="$cache/ppm_$n/`basename "$m" .ps`.ppm"
+	    normalizeschps "$m" | schps2ppm - "$ppm" || exit
+	    ppm="$cache/fat_$n/`basename "$m" .ps`.ppm"
+	    normalizeschps -w 500 "$m" | schps2ppm - "$ppm" || exit
+	done
+	rm -rf "$tmp"
     fi
     for m in "$cache/ppm_$n/"*; do
 	[ "$m" = "$cache/ppm_$n/*" ] && break