Compass Inline Data Helpers
inline-image($image, $mime-type)
Embeds the contents of an image directly inside your stylesheet, eliminating the need for another HTTP request. For small images, this can be a performance benefit at the cost of a larger generated CSS file.
Like the image-url() helper, the path
specified should be relative to your project's images directory.
inline-font-files([$font, $format]*)
Like the font-files() helper, but the font
file is embedded within the generated CSS file.