* update a few examples to use compile
* update mnist
* add compile to vae and rename some stuff for simplicity
* update reqs
* use state in eval
* GCN example with RNG + dropout
* add a bit of prefetching
* Add grad checkpointing and PE in the transformer example
* Remove other frameworks from LM example
* Remove the other frameworks from MNIST example
* Improve the transformer LM example
* Fix black and change LR