update pylearn2 dataset creation
update pylearn2 dataset creation


Former-commit-id: 8c676a1a8d65cb63db4e49f418827ec0f4b0b951
Former-commit-id: 4a465c46369e19f487b0eb92736d78763e3ae02b
dssg/wikienergy,dssg/wikienergy,dssg/wikienergy,dssg/wikienergy,dssg/wikienergy