Learning digits of pi using an LSTM

Demonstrates training a simple autoregressive LSTM network in Tensorflow and then porting that model to deeplearn.js.

This network uses two BasicLSTMCells combined with MultiRNNCell. The network is trained to memorize the first few digits of pi.

First, train the LSTM network with Tensorflow:

python demos/lstm/train.py

Next, export the weights to be used by deeplearn.js:

python scripts/dump_checkpoint_vars.py --output_dir=demos/lstm/ --checkpoint_file=/tmp/simple_lstm-1000 --remove_variables_regex=".*Adam.*|.*beta.*"

Finally, start the demo:

./scripts/watch-demo demos/lstm/lstm_inference.ts