groff and refer compatibility added

.scripts/compiler

@@ -36,8 +36,11 @@ shebangtest() {
 	esac
 }
 
+# If there is a global $REFBIB variable/file for `refer`, use it.
+[ -f "$REFBIB" ] && groffbib="-p $REFBIB"
 
 case "$file" in
+	*\.ms) refer $groffbib "$file" | groff -ms -T pdf > "$base".pdf ;;
 	*\.rmd) echo "require(rmarkdown); render('$file')" | R --vanilla && mv "$base".pdf "$dir"/pdfs;;
 	*\.tex) textype "$file" ;;
 	*\.md) pandoc "$file" --pdf-engine=xelatex -o "$base".pdf ;;