shoes/shoes4 — pull request #605 by KCErb (2014-03-12 19:41:26+00:00)
Title: added X11 shades of gray, changed background to gray93

It looks like Shoes3 used the "gray" method to get the classic Shoes look.

This commit deletes "gray" and creates a bunch of new grays (and greys) in the Shoes::COLORS scope. Lastly it uses the same gray that Shoes3 used, to start the app with gray93 as a default background.