* ETS prediction
* Update 'backtesting' and plots
* Knn model
* Keras/tf models refactored
* ARIMA models and poetry/req updates
* edit test
* Regression condensed
* Hugo server
* Add tabulate to nn predictions and fix pylint
* Add tabulate to prediction statistics
* review comments
Co-authored-by: James Maslek <james@macbook-pro.myfiosgateway.com>