Switch to side-by-side view

--- a/scripts/rethumb.py
+++ b/scripts/rethumb.py
@@ -4,7 +4,7 @@
 import pkg_resources
 import Image
 import tg
-from pylons import c
+from pylons import tmpl_context as c
 from paste.deploy.converters import asint
 
 from ming.orm import mapper, ThreadLocalORMSession, session, state, Mapper