Switch to side-by-side view

--- a/ForgeSVN/forgesvn/widgets/revisions.py
+++ b/ForgeSVN/forgesvn/widgets/revisions.py
@@ -2,5 +2,6 @@
 
 class SVNRevisionWidget(ew.Widget):
     template='genshi:forgesvn.widgets.templates.revision'
-    params=['value']
+    params=['value', 'prev', 'next']
     value=None
+    prev=next=None