Merge pull request #4 from qiaoD/master

Merge pull request #7 from echatzidaki/master

Fixed some layers problems

Update solver.py

Running rnn with large corpora

added vanilla RNN and RNN sgd

implemented RNN class

implemented forward and backward for v-rnn

formatted using autopep8

implemented batch accuracy testing in sgd_momentum

added readme and licence. added l1 reg

project diretory structure changed

Performed numerical gradient check of layers

Added regularization and momentum SGD

refactored sgd and var names in layers