app/assets/stylesheets/application.css
app/assets/stylesheets/some_slider_lib.css
app/assets/stylesheets/bootstrap.min.css

public/assets/application-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.css
public/assets/some_slider_lib-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.css

config.assets.precompile += ["*.css", "*.scss", "*.js", "*.coffee"]