Haiku implementation of Closed-form Continuous-time Neural Networks (CfCs) as presented in: https://arxiv.org/abs/2106.13898. Designed to be used as a standalone Haiku module. Dataset and training loop are taken directly from https://github.com/deepmind/dm-haiku/tree/main/examples/rnn for the purpose of demonstrating its drop-in compatability with Haiku RNN tooling.