Manually updating versions to include 0.18.0 and 0.18.1.

Author: dhermes

versions.html

@@ -53,6 +53,8 @@ <h1 class="page-title">Versions</h1>
   <div class="toctree-wrapper compound">
 </div>
 <ul id="versions">
+<li><a href="0.18.1/index.html">0.18.1</a></li>
+<li><a href="0.18.0/index.html">0.18.0</a></li>
 <li><a href="0.17.0/index.html">0.17.0</a></li>
 <li><a href="0.16.1/index.html">0.16.1</a></li>
 <li><a href="0.16.0/index.html">0.16.0</a></li>