Smolder

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- Adds support for default overrides
- Supporting Docker testing
- Community contributions
- Big thanks to https://github.com/hekaldama

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- 0.3.0 is looking to resolve defaults globally using immutable data structures, deep copied and updated for defaults.
- Handles issues with requests where the verify var accepts both bools and strings.
- Adds support for smolder warnings (not python warnings).
- Some unit test improvements.
- Big enough change surface area to warrant a 'major' version bump.

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- Improved certificate validation

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- Fix bug with tcp test defaults.

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- Added input validation for tests
- Moved classification to production/stable

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- Rewrote and reorganised everything to be more pythonic
- Implemented the yapsy plugin system
- json validation from validictory
- *** Breaking changes *** to the test schema
- Added inputs dict section with inputs and structure matching the underlying requests verbs exactly (pass through)
- Added an outcomes section to be more clear about logic
- request_headers becomes simply headers
- smolder-cli command line tool becomes simply smolder
- If you are inheriting, inherit from charcoal package
- validate_cert becomes verify (as it is passed through to requests directly), and goes under inputs
- See commit 8e7bc1c for examples of how the test structure has changed.