Nnrf

-  : [`Optimizer`](https://github.com/paradoxysm/nnrf/blob/master/nnrf/ml/optimizer.py) now extends [`Base`](https://github.com/paradoxysm/nnrf/blob/master/nnrf/utils/_base.py) for consistency.

-  :
[`NNRF`](https://github.com/paradoxysm/nnrf/blob/master/nnrf/_nnrf.py) and [`NNDT`](https://github.com/paradoxysm/nnrf/blob/master/nnrf/_nndt.py) implemented!
-  : [`NeuralNetwork`](https://github.com/paradoxysm/nnrf/blob/master/nnrf/_nn.py) and [`DESKNN`](https://github.com/paradoxysm/nnrf/blob/master/nnrf/_des_knn.py) implemented.