DBM - Hinton & Salakhutdinov paper

Pylearn2 implementation of the whole procedure to train a DBM described by Hinton & Salakhutdinov in "An Efficient Learning Procedure For Deep Boltzmann Machines".
This pr adds a fast version for the test script to be run on travis together with some changes to the format and the readme file. I also moved augment_input from datasets to /scripts/dbm.