Add contributors and expand README

[brosaplanella]

Description

Added contributors to codemeta.json and also added description and some of the other information in the README. This should satisfy FSRM-06.

Fixes #79

Type of change

Please add a line in the relevant section of CHANGELOG.md to document the change (include PR #) - note reverse order of PR #s. If necessary, also add to the list of breaking changes.

• [ ] New feature (non-breaking change which adds functionality)
• [ ] Optimization (back-end change that speeds up the code)
• [ ] Bug fix (non-breaking change which fixes an issue)

Key checklist

• [ ] No style issues: $ python -m nox -s lint
• [ ] All tests pass: $ python -m nox -s unit examples integration
• [ ] Coverage is complete $ python -m nox -s coverage
• [ ] The documentation builds: $ python -m nox -s sphinx

Further checks

• [ ] Code is commented, particularly in hard-to-understand areas
• [ ] Tests added that prove fix is effective or that feature works