Various fixes

1. Rescues from TypeError and ActionView::Template::Error
We had lots of bots causing exceptions by trying URLs like this /api/doc/users/%7cdir.html

2. Fixed disqus embed code to work over https also

3. fixed layout issue where the class='row' (without a class='span12' etc) was causing the container to be off center.

Feel free to cherry pick if easier.  Thanks!