jboesch/Gritter — pull request #51 by AlfRjw (2014-01-16 15:17:42+00:00)
Title: Patch to fix android bug which ignores background shorthand

I noticed that android 4.x displays nearly invisible notifications.
Tried useing the gritter-light class and that works, so I checked the differences and noticed that with explicit background-image for the default case it works.
using explicit background-image instead of shorthand so that android displays correctly