Add config Importer API

[Glavin001]

Import configurations from external sources:

• EditorConfig
• Atom Linters, see Add importer linter-jscs #286
• CSScomb's .csscomb.json file
• JS Beautifier's .jsbeautifyrc file

Some of these are already implemented internally. These should be moved out into reusable components using an API of some form, similar to how Beautifiers now work after #282.

[danielbayley]

Would be handy if we could specify a path to a custom csscomb.json in the settings.

[solarsailer]

I agree. I'd prefer to store the .csscomb.json file into my $HOME folder (like other dotfiles) than in each project. :)

I think that this use case might be applicable to other beautifiers as well.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. If this is still an issue, please add a comment. It will be closed if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. If this is still an issue, please add a comment. It will be closed if no further activity occurs. Thank you for your contributions.

[Glavin001]

Should add more to this list.

[Glavin001]

This will be implemented in Unibeautify: https://github.com/Unibeautify/unibeautify-options-importer