rubysg/rubysg — pull request #7 by weimeng (2013-11-29 17:41:10+00:00)
Title: Add favicon

As requested in https://www.pivotaltracker.com/story/show/61347624.

Some notes: I adapted the favicon from `logo.png`. Was thinking of adding an "SG" using a pixel font but thought twice of it as I wasn't sure it would turn out well in such a tiny space.