Switch to black/flake8 + extensions about idarling

[NyaMisty]

I am strongly against the line length of 79. It's really frustrating sometime and I REALLY want to change it to line length 89 or 99.

[hacksysteam]

@NeatMonster why not use pycharm, it has all the format thing you are looking for.

[patateqbool]

@hacksysteam I think we don't want to force users/developers to use an specific IDE.

[NeatMonster]

I am strongly against the line length of 79. It's really frustrating sometime and I REALLY want to change it to line length 89 or 99.

The line length is not going to change. @patateqbool is using vim in his terminal so I don't want to go over 80 characters or it would become a lot less readable for him. But because manually fixing the formatting is a tedious task, I believe an automated tool like black brings a lot of good to the table.

[NeatMonster]

Here's what we've settled down on:

• using black for auto-formatting;
• checking code-style using flake8 and
  • using the pep8-naming plugin;
  • using the flake8-import-order plugin.

Take a look at the file .travis.yml to see how to check code-style.