Add lifter for IfElse.

Try to detect bug in nvcc.

small cleanup, update

Doc to check for easy fix issue as a good starter

Fix scan pushout

Fix small buildbot problems

We need to import gof.compiledir in theano-cache.

code doesn't work.

client checking.

Move the AbstractConv tests with the implementation

Fix stale import of cuda_enabled in rng_mrg.py (#4098)

Remove empty string in the include and lib dir.

Ad dnn.include_dirs by default includa cuda_root, we remove it by default instead of doing a warning.

Move leftover flags

gpu dnn pool takes tensor variables

New problems cropped up on the buildbot

Add doc for opt.py

Don't let scan AllocEmpty cause false alarm by NanGuardMode