Training an RNN to classify sequences using just the last LSTM output

[aodhan-domhnaill]

I did this as a demo for a particular project. I can polish it up if you want it.

You basically just run an LSTM on every sequence, take the last output for each sequence and the push that through a neural net.

There are 2 demos training on generated data and then one classifying sentences as Spanish or English. The language one is tested using entirely different novels.

[zackchase]

Hi aidan - just got back to town after a couple weeks abroad plus some insane paper deadline - looking forward to reviewing this properly. Thanks for the PR!