change save and load Base behavior

Everything in config is saved unless something is unpickable (in that case only w2 debug and uncased are saved)

1.6.1

Enhanced docstring readability for improved code documentation.
Update readme.
Refactored load_games function.
Removed the multiplication by 100 of the uncertainty coefficient in the player ratings retrieval process.
Replaced the inspect method in the Game class with the __str__ method for more intuitive object representation.

1.5

new:

• add proper tests
• use black formatting
• add utils script to contain error classes and utility functions

updated:

• modify inspect so that it’s coherent across save and load
• modify playerday elo to a property attribute
• modify player log_likelihood computation to comply with tokoharu pull request
• modify player hessian, covariance and update_by_ndim_newton computation to comply with tokoharu pull request

1.4

+add possibility to set the base to uncased (shusaku and Shusaku will be the same player)
+you can get ordered ratings both in compact form and only current elo
~you can put 'b' or 'w' in lower case for the winner

1.3.4

delete two prints in _setup_game and create_game

1.3.3

fix

fix a bug were you can't change w2 if you don't mention debug as well
add a trim to list given to load_games so that you can put space before or after the separator