More customization for Python (AutoPEP8)

[Glavin001]

See autopep8 usage.

• max line length
• indent size
• ignore errors

/cc @dreid93 @liamcoau , here's to you buds :).

[Glavin001]

• Can configure globally for Atom in package settings.
• Can configure in .jsbeautifyrc file under global or python namespace:

Example:

{
    "python": {
        "indent_size": 4,
        "max_line_length": 79,
        "ignore": ["E24"]
    }
}

• Tested changing all options on test.py file.