Hopefully this gets finalized next week
Add CssMinify package
[mms] Move CSS minification to the Horde_CssMinify package.
Add unit test for a failing issue.
[mms] Fixed comments parsing.

Cherry-picked 21ac4d9fb408f803aac180503c41f3e4648f575f from upstream
Released Horde_Css_Parser-1.0.4
Development mode for Horde_Css_Parser-1.0.5