Dover

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- added new dover config option for projects using pyproject.toml
- started use of `black` for code formating

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- Added `--dev` option as a pre-release state.
- Added `--release` option that clears any pre-release
versioning.
- Added `--format` option that allows user to control the
format from the standard `0.0.0-dev.1` format.

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- documentation update to deal with
invalid README formating.

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- added pre-release options
- added --no-list option
- expanded documentation
- 100% code coverage

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- expanded tests
- general code clean up

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- improved alignment of output
- added additional version matching check