Building process for more structure

The neural network files should be more organized.
The community contributes really great features, but it gets a little bit messy in my opinion inserting everything basically into one file.

good example would be #78

The issue does not name specific files or tests. Start by reviewing the current neural network files and the organization discussed in issue #78; completion would require a clearly defined, more structured arrangement, but the desired boundaries and acceptance criteria are not specified.

Written by the indexing model from the issue text.