more robust data URI output
more robust data URI output

When 'datauri' is the only type specified and resources are not split into
separate files, CSS Unity will write the original css declaration with a star
hack (to target IE6/7) directly below the datauri declaration. This way, using
type=datauri will not break IE6/7; those browsers will behave normally,
requesting external resources the old fashioned way.

oroboto/css-unity