Adds a list of stylesheets in the frontend to allow visitors to choose a different visual look for the website.
I couldn't find this solution in other plugin, so I developped it. This plugin is useful when developping a website, so we can keep a few alternative stylesheet and switch back and forth, or let a client chose his favorite one.
In my child theme folder, my style.css file only contains the link to the original theme css: @import url("../twentythirteen/style.css");
Then my other files only need to override the original styles.