Fixed http->https on content from ghbtns.com, fixes mixed-content war…

…ning.

docs/_templates/sidebarlogo.html

@@ -17,7 +17,7 @@
 <h3>Stay Informed</h3>
 <p>Receive updates on new releases and upcoming projects.</p>
 
-<p><iframe src="http://ghbtns.com/github-btn.html?user=kennethreitz&type=follow&count=true"
+<p><iframe src="https://ghbtns.com/github-btn.html?user=kennethreitz&type=follow&count=true"
  allowtransparency="true" frameborder="0" scrolling="0" width="200" height="20"></iframe></p>
 
 <p><a href="https://twitter.com/kennethreitz" class="twitter-follow-button" data-show-count="false">Follow @kennethreitz</a> <script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+'://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs');</script></p>