Luke Hendrickson

With recent TensorFlow and Keras updates, the `lr` parameter is no longer supported in the Adam optimizer. Instead, `learning_rate` is used. I updated `predict.py` to reflect this. Resolves issue [#38](https://github.com/KarchinLab/mhcnuggets/issues/38)

Added the ability to essentially link related sources together. When logged in, a button to do so appears next to the existing "Suggest a New Source" button. More information can...