make course about view methods render the about content as a module, so we get all the url rewriting goodness. Also, since we're now handling the url re-writing via the module get_html pipelines, we can remove the link rewriting inside the xmodules itself - which is good because there's a wierd bug in lxml.html rewriting

common/djangoapps/xmodule_modifiers.py

@@ -59,6 +59,7 @@ def replace_static_urls(get_html, prefix, course_namespace=None):
 
     @wraps(get_html)
     def _get_html():
+        logging.debug('in replace_static_urls')
         return replace_urls(get_html(), staticfiles_prefix=prefix, course_namespace = course_namespace)
     return _get_html