Switch to side-by-side view

--- a/requirements.txt
+++ b/requirements.txt
@@ -7,6 +7,7 @@
 Jinja2==2.3.1
 Mako==0.3.2
 Markdown==2.0.3
+MarkupSafe==0.11
 PIL==1.1.7
 Paste==1.7.3
 PasteDeploy==1.3.3