sass/libsass — pull request #583 by sufianrhazi (2014-10-28 17:53:27+00:00)
Title: Compass-style import once behavior

This adds [commpass-style import-once behavior](https://rubygems.org/gems/compass-import-once) to libsass, without the exclamation point suffix override.

Though this was a closed issue in #450, we depended on this functionality and using ruby sass was simply not performant enough for our needs.