Adds noscript box over login in the index page as well, for MIT ESP

Note: For this to work, should add the following line into the
div#login_div on index.html

<div id="login_div">
{% if not request.user.is_authenticated %}
<noscript><div class="noscript_blocker"><p>Please <a href="http://www.enable-javascript.com/">enable</a> javascript to log in</p></div></noscript>
<!-- login -->

This is a template override. Of course.