Move static files to a directory `/static/comment/`

[abhiabhi94]

It should be noted that django-comments-dab does break Django convention in regard to the static files. On the Managing Static Files page, on section 4 of "Configuring Static Files", Django recommends to: Store your static files in a folder called static in your app. For example my_app/static/my_app/example.jpg.

Django-comments-dab omits the second my_app folder within static, and instead uses the folder structure: my_app/static/example.jpg.

So the current docs are correct, and the directory to put files in for overwriting is static/css.

Originally posted by @pomeroyb in https://github.com/Radi85/Comment/issues/219#issuecomment-899215659