Switch to side-by-side view

--- a/requirements-common.txt
+++ b/requirements-common.txt
@@ -8,7 +8,7 @@
 chardet==1.0.1
 Creoleparser==0.7.3
 datadiff==1.1.2
-decorator==3.1.2
+decorator==3.3.1
 docutils==0.6
 EasyWidgets==0.2dev-20110504
 feedparser==5.0.1