JrSchild/grunt-retinafy — pull request #1 by crismanNoble (2014-05-07 16:45:37+00:00)
Title: Updating README to reflect Imagemagick dependency.

I wanted to use this plugin, as it solves my use case perfectly, however it took me a few hours of googling "spawn" error to figure out that Imagemagick is required on the system. This simple clarification in the README will hopefully save future devs frustration.