stubbornella/oocss — pull request #134 by mobywhale-chan (2012-11-07 16:09:32+00:00)
Title: Turned helper classes into mixin

Changes:
- Removed `_helpers.scss`
- Split classes into `_imageReplacement.scss` and `_hide.scss`
- Wrap classes around a mixin
- @import the new SCSS files in `_screen.scss`

I didn't add @include to trigger the mixin. I thought it's better to leave that to the individuals otherwise they'll end up including CSS they don't use in their output CSS.