allow references to other MD files

just replace the suffix

kew.go

@@ -88,6 +88,21 @@ func copy_file(src string, dst string) error {
 	return err
 }
 
+func fix_md_references(s string) string {
+	r := strings.NewReplacer(
+		/* common cases */
+		".md)", ".html)",
+		".md\"", ".html\"",
+		".md'", ".html'",
+		".md)", ".html)",
+		".md#", ".html#",
+		".md>", ".html>",
+		".md ", ".html ",
+		".md,", ".html,",
+	)
+	return r.Replace(s)
+}
+
 func markdown_to_html(path string) (string, error) {
 	cmd := exec.Command("lowdown", "-Thtml")
 
@@ -192,6 +207,7 @@ func main() {
 			if err != nil {
 				return err
 			}
+			html = fix_md_references(html)
 
 			relhtml := strings.TrimSuffix(rel, ".md") + ".html"
 			cur := relhtml