tdozat

Hmm, that's strange because the [tensorflow docs](https://www.tensorflow.org/api_docs/python/state_ops/variables#Variable.value) suggest that Variable objects should have a ref attribute, but they also don't list it? The code here was originally developed for tensorflow...

At the time when I developed this, there were a couple things I wanted to build into the optimizer for the sake of convenience and so I could implement them...