Acanthophis

As published in JOSS.

What's Changed
* A new, improved Acanthophis by kdm9 in https://github.com/kdm9/Acanthophis/pull/1


**Full Changelog**: https://github.com/kdm9/Acanthophis/compare/0.2.0...1.0.0-rc3

**Full Changelog**: https://github.com/kdm9/Acanthophis/compare/0.3.1...0.3.2

This is effectively another prerelease of 1.0, however packaged as a formal full release so that an installer can be built to aid peer review. This will quickly be superseded by 1.0, all going to plan. Regular users can ignore this release.