ox-html: Change footpara wrapper

* ox-html.el (org-html-footnote-section): Wrap footnote definitions
  content in a div rather than a p.  p is a bad element to use for a
  wrapper as it can neither contain other p elements nor tables.
  (org-html-style-default): Change .footpara to inline display style.

Reported-by: OSiUX <xuiso@osiux.com.ar>
<http://permalink.gmane.org/gmane.emacs.orgmode/98984>

lisp/ox-html.el

@@ -334,8 +334,7 @@ for the JavaScript code in this tag.
   td.org-left   { text-align: left;   }
   td.org-center { text-align: center; }
   dt { font-weight: bold; }
-  .footpara:nth-child(2) { display: inline; }
-  .footpara { display: block; }
+  .footpara { display: inline; }
   .footdef  { margin-bottom: 1em; }
   .figure { padding: 1em; }
   .figure p { text-align: center; }
@@ -1649,7 +1648,7 @@ INFO is a plist used as a communication channel."
 	  (loop for (n type raw) in fn-alist collect
 		(cons n (if (eq (org-element-type raw) 'org-data)
 			    (org-trim (org-export-data raw info))
-			  (format "<p class=\"footpara\">%s</p>"
+			  (format "<div class=\"footpara\">%s</div>"
 				  (org-trim (org-export-data raw info))))))))
     (when fn-alist
       (format