Fix bug Torch doesn't have torch::Sigmoid. Should be torch::sigmoid.

Add backward pass for the lltm function This gives us the forward, backward, and pybind bits we nee

Add torch to setup.py I was missing this dependency.

Adding torch as a dependency for Travis Builds were automatically failing without this dependency.

Add lltm forward function This starts us on the path for C++ extensions.

Add shield Show that we are not getting stuck by Python Y2K.