partly completed work on scan (have to commit to merge)

57a9ffe8 · pascanur@simplet.iro.umontreal.ca · 0dbd3931 · 57a9ffe8 · 57a9ffe8
--- a/theano/sandbox/scan.py
+++ b/theano/sandbox/scan.py
--- a/theano/sandbox/test_scan.py
+++ b/theano/sandbox/test_scan.py