Fix file format.
Use direct import
Remove a warning from a test ast pylearn2 warn when save_path isn't used
Add a test for Theano that depend on pylearn2 stuff.
cache the cifar 10 datasets
Don't load TFD too many times before each test. Keep only 1 dataset version in ram at a time.

setUp() is called before each tests.
Don't keep all loaded datasets in ram.
better tl challenge datasets tests and cache it.
pep8
Make test work with default flags.
pep8 inside yaml string.
Keep for shorter time some datasets in ram.
remove useless comment.
Merge pull request #980 from nouiz/theano_test

tests and cache datasets