CKEditor config_name

[sveetch]

Is your feature request related to a problem? Please describe.
Lotus try to use a specific config name for ckeditor settings to use on widget: https://github.com/emencia/django-blog-lotus/blob/master/lotus/forms/article.py#L23

But this is not documented anywhere, so user can not know about this feature and may think it is tied to the default ckeditor config name.

Describe the solution you'd like
Properly documentate this behavior, it is most likely to be done in its own page and also update model field docstring to reference about it.

Describe alternatives you've considered
This feature has not been really tested or even checked, we should ensure it is working correctly.

[sveetch]

This is on hold because we are trying to implement a new solution (in #80 ) that would allow to select another editor than just CKEditor 4 from django-ckeditor which is deprecated anyway.