Converted the auto-encoder to use the PyLearn2 backend module.
Converted the auto-encoder to use the PyLearn2 backend module.

agomariz/scikit-neuralnetwork,IndraVikas/scikit-neuralnetwork,aigamedev/scikit-neuralnetwork,gticket/scikit-neuralnetwork,freakynit/scikit-neuralnetwork,KhanSuleyman/scikit-neuralnetwork