Merge pull request #71 from story645/contribute

Change develop in nav bar to contribute

Author: timhoffm

mpl_sphinx_theme/mpl_nav_bar.html

@@ -15,7 +15,7 @@
     <a class="reference internal nav-link" href="{{ mpl_path('users/index') }}">User guide</a>
   </li>
   <li class="nav-item">
-    <a class="reference internal nav-link" href="{{ mpl_path('devel/index') }}">Develop</a>
+    <a class="reference internal nav-link" href="{{ mpl_path('devel/index') }}">Contribute</a>
   </li>
   <li class="nav-item">
     <a class="reference internal nav-link" href="{{ mpl_path('users/release_notes') }}">Releases</a>