It seems the editor automatically loads the wysiwyg.css styles on load time, so it's not necessary to require the path in your application.css file as stated in the readme.
It loads them automatically within activeadmin, but you generally still want to load the styles on the frontend too, so that floats, font-sizes, etc..., work properly.
It seems the editor automatically loads the wysiwyg.css styles on load time, so it's not necessary to require the path in your application.css file as stated in the readme.