Add user-specified variables

[mayersjd]

Currently all the parameters are hard-coded to particular values, this should be changed to allow for users to input their own desired parameters.

For example:

• NN input size (how many data points are used for training)
• Inferencing time frame (how far in the future should a predication be made)
• The percentage to break the datasets into training and validation
• The various NN parameters (training epochs, number of layers, number of neurons, activation function, optimizer, etc.)
• Probably some more!

I think using kwargs to do this would be best.

[mayersjd]

Resolved and merged into main