made flip+window code take three lists of datasets: randomize, randomize_once, and center
Merge pull request #184 from goodfeli/windowflip_fixed

made flip+window code take three lists of datasets: randomize, randomize...
removed some deprecated examples
Merge branch 'master' of github.com:lisa-lab/pylearn2
Update the Travis file to build the Cython code.
Attempt to diagnose the Travis failure.
Invert argument order.
Fix test, PEP8, doc format.