Support _underline_

src/bigblow_theme/css/bigblow.css

@@ -751,6 +751,10 @@ p.verse {
     cursor: pointer;
 }
 
+.underline {
+  text-decoration:underline
+}
+
 /* This is for the sake of Emacs. */
 /* Local Variables: */
 /* eval: (when (locate-library "rainbow-mode") (require 'rainbow-mode) (rainbow-mode)) */

src/readtheorg_theme/css/readtheorg.css

@@ -1138,3 +1138,7 @@ h2.footnotes{
     text-align: right;
     padding-right: 10pt;
 }
+
+.underline {
+  text-decoration:underline
+}