Cleanup test
Update docstring to reflect changes in #772 and roll back erroneous merge
Cleanup test
Clean up formatting in train_extensions/__init__.py
Upstream changes
Reorganize cv tests
Add cv iterators for train/valid/test splits
Add more tests
Update docstrings
Merge in preprocessing stuff
Re-add new dataset iterators
Update docstrings
Fix test imports
Set failed imports = object
Merge branch 'master' of github.com:lisa-lab/pylearn2 into cv_validation_set
Deepcopy Train components instead of Train object
Cleanup variable use
Upstream changes
Update docstrings
Update docstrings