Use correct Compass version.

Not 100% of the syntax being correct, but ultimately we need to block this from using 1.0.0 versions of compass as they seem to be imcompatible throwing an error about the haml version not working. And if you update the haml version, it then throws an error about a Frozen Array.
Merge pull request #174 from blainekasten/1-1-stable

Use correct Compass version.