Merge Development for v0.4.0

[derb12]

Description

Merge development branch for version 0.4.0.

Type of Pull Request

• [x] Bug Fix
• [x] New Feature
• [x] Miscellaneous Changes (refactor, code improvements, etc.)
• [x] Documentation or Example Programs

Pull Request Checklist

• [x] New code and/or documentation is unique (not copied from elsewhere), and valid for use with the BSD 3-clause license.
• [x] New code is fully documented with docstrings that follow Numpy style, if applicable.
• [x] New code follows PEP 8 standards as closely as possible, if applicable.
• [x] Added/updated tests, if applicable.
• [x] Verified that documentation builds locally, if applicable.