Add invite signup

docs/template.html

@@ -167,7 +167,32 @@
             <div id="table-of-contents">
               <ul class="nav nav-list side-nav well sidebar-nav-fixed">
                 {{ toc }}
+              <div>
+              <hr>
+
+<p><strong>The team behind REST framework are launching a new API service.</strong></p>
+
+<p>If you want to be first in line when we start issuing invitations, please sign up here:</p>
+
+<!-- Begin MailChimp Signup Form -->
+<link href="//cdn-images.mailchimp.com/embedcode/slim-081711.css" rel="stylesheet" type="text/css">
+<style type="text/css">
+    #mc_embed_signup{background:#fff; clear:left; font:14px Helvetica,Arial,sans-serif; }
+    /* Add your own MailChimp form style overrides in your site stylesheet or in this style block.
+       We recommend moving this block and the preceding CSS link to the HEAD of your HTML file. */
+</style>
+<div id="mc_embed_signup" style="background: rgb(245, 245, 245)">
+<form action="http://dabapps.us1.list-manage1.com/subscribe/post?u=cf73a9994eb5b8d8d461b5dfb&amp;id=cb6af8e8bd" method="post" id="mc-embedded-subscribe-form" name="mc-embedded-subscribe-form" class="validate" target="_blank" novalidate>
+<!--     <label for="mce-EMAIL">Keep me posted!</label>
+ -->    <input style="width: 90%" type="email" value="" name="EMAIL" class="email" id="mce-EMAIL" placeholder="email address" required>
+    <div class="clear"><input class="btn btn-success" type="submit" value="Yes, keep me posted!" name="subscribe" id="mc-embedded-subscribe" class="button"></div>
+</form>
+</div>
+</style></div>
               </ul>
+
+
+<!--End mc_embed_signup-->
             </div>
           </div>