zurb/foundation — pull request #4294 by alandaguegreene (2014-01-31 07:14:57+00:00)
Title: Automatically generate visibility classes

Replaces most of the visibility classes with a mixin that simplifies the process of adding or removing breakpoints and their associated visibility classes. Resulting CSS is comprehensive without containing any extraneous or nonsensical classes, and is far less error-prone.