Switch to side-by-side view

--- a/Allura/allura/templates/repo/diff.html
+++ b/Allura/allura/templates/repo/diff.html
@@ -10,6 +10,12 @@
 <a href="{{a.url()}}">{{a.commit.shorthand_id()}}</a>
 ..
 <a href="{{b.url()}}">{{b.commit.shorthand_id()}}</a>
+{% endblock %}
+
+{% block actions %}
+<a href="{{blob.commit.url()}}log/">
+  <b data-icon="{{g.icons.history.char}}" class="ico {{g.icons.history.css}}" title="History"> </b>
+</a>
 {% endblock %}
 
 {% block content %}
@@ -40,4 +46,4 @@
   <style type="text/css">
     .clip h3 {margin-bottom: 0;
   </style>
-{% endblock %}+{% endblock %}