twitter/bootstrap — pull request #4056 by ajkochanowicz (2012-07-10 19:34:15+00:00)
Title: Retina Display Classes

Adding classes for toggling visibility on elements on retina displays.

These work in the same way as the ```.visible-phone``` or ```.hidden-desktop``` etc. classes work by toggling between "none" or "inherit" for the "display" attribute. By default, ```.visible-hd``` is not shown.