Theano/Theano — pull request #212 by dwf (2011-11-16 18:32:30+00:00)
Title: Rebased new lazy ifelse

This is a resubmit of #26, rebased on top of today's master, with a few more commits from me. Everything up to b42b547bcb00d4 is reviewed, though certain optimizations are causing problems so we've opted to disable them for now.