<ul class="main-navigation">
  <li><a href="https://twitter.com/{{ site.twitter_user }}">Twitter</a></li>
  <li><a href="{{ site.baseurl }}/archives">Archives</a></li>
  <li><a href="{{ site.subscribe_rss }}" rel="subscribe-rss" title="subscribe via RSS">RSS</a></li>
  <li><a href="/about/" data-no-instant>About</a></li>
</ul>

<ul class="main-navigation">
  <li><a href="https://twitter.com/{{ site.twitter_user }}">Twitter</a></li>
  <li><a href="{{ site.baseurl }}/archives">Archives</a></li>
  <li><a href="{{ site.subscribe_rss }}" rel="subscribe-rss" title="subscribe via RSS">RSS</a></li>
  <li><a href="/categories/talks/" data-no-instant>Talks</a></li>
  <li><a href="/about/" data-no-instant>About</a></li>
</ul>

Add link to talks to main nav
Add link to talks to main nav
