Add sparse activation autoencoder cost
Merge branch 'master' of github.com:lisa-lab/pylearn2 into sparse_activation
Fix test while waiting on #855
Add URL for implmentation notes
Update docstring
Merge branch 'master' of github.com:lisa-lab/pylearn2 into sparse_activation
Merge branch 'master' of github.com:lisa-lab/pylearn2 into sparse_activation
Reduce test
Merge pull request #850 from skearnes/sparse_activation

Add sparse activation autoencoder cost