Merge pull request michaelhush#32 from michaelhush/NeuralNetA

Merge NeuralNet into main branch

v2.1.1 Candidate

Updated the documentation.
Candidate for new version to be released on PyPI

Candidate for tag v2.1.0

Candidate for version 2.1.0 release.

Ready for version 2.0.3 tag

Updated for the git tag update

Update for official release

Completed documentation.

Fixed a few bugs with file writing formats with ‘txt’ in particular

Added tutorial to documentation

Added another example for the tutoiral, and made a corresponding test.

Fixed bug with reading matlab files for plots.

Changed some keywords to do with file_types and files.

Moved version to 2.0.1

Initial release for 2.0.0