Pybet

Refactorings

- Improve type hinting in `kelly`
- Improve var names in `kelly`
- Replace check for negative `kelly` with use of max

Others

- Configure ignores for coverage
- Complete coverage in `Odds` and `Market`
- Suspend type checking on complex constructors

Added

- [Documentation pages at readthedocs.io](https://pybet.readthedocs.io)

Other

- Major internal linting, build and ci changes

Added

- `staking` module
- `staking.kelly` method

Added

On `Market` class

- `.apply_margin` instance method
- `.equalise` instance method
- `.fill` instance method
- `.wipe` instance method

Added

- `Market` class
- `.favourites` property
- `.percentage` property
- `.overround_per_runner` property
- `.is_overbroke` property
- `.is_overround` property
- `.is_fair` property
- `.without` instance method

Added

- `Odds` class
- Class methods to instantiate `Odds` from moneyline, fractional odds, implied percentage and probability
- Instance methods to convert `Odds` to moneyline, fractional odds, implied percentage and probability
- `.evens` class method
- `.inverted` class method
- `.is_odds_against` and `.is_odds_on` properties
- Dunder methods for `__str__, __add__, __mul__, __rmul__, __true_div__`
- `STANDARD_FRACTIONALS` constant