Ordering test set Dogs vs. Cats

The test set of the Dogs vs. Cats in Fuel was ordered based on strings instead of numerically (i.e. 1, 10, 11, …, 2, … instead of 1, 2, …). When submitting to Kaggle it expects the latter, which meant that the test scores did not make sense. This was fixed in Fuel pull request #336. If you are using the cluster, the dataset has been updated (if you need the old HDF5 file it can be found under dogs_vs_cats.old.hdf5). If you run your own installation, please update Fuel and rerun fuel-convert dogs_vs_cats.