title: Using Font Awesome in ui.bootstrap.rating
body: <p>How can I use Font Awesome in ui.bootstrap.rating?
  I found out, that when I add <code>state-on="'fa-star'" state-off="'fa-star-o'"</code> to  and changed <code>class="glyphicon"</code> to <code>class="fa"</code> in ui-bootstrap-tpls it works.
  But I guess there is a more custom way to change the class of the icons.</p>