Added classical sigmoid RBM
Added LIF deep autoencoder (in separate folder)
Playing around with encoder learning using PES

- doesn't work
Renamed sigmoid rbm directory
Comparision of sigmoid and LIF in spiking

- results for Chris for CogSci 2014
Added no-code net with shifted training set

- No-code means there is no linear code layer, just LIFs until
  the classification output layer.
- Shifted training images significantly decrease the error on
  the test set.