This module is designed to make it easier for users to add custom stylesheets to a site.
This module allows an admin user to link in external libraries via URLs, or upload new CSS files. After adding a stylesheet, it is available for all modules and themes.
This is a tool for site builders who don't want to write a module to get a CSS file available throughout all themes or modules.
Example usage: add a CSS library with grid classes definitions and then reuse the classes in your theme CSS files, panel layouts CSS and etc.