thoughtbot/paperclip — pull request #1169 by chadoh (2013-02-19 16:55:52+00:00)
Title: Add default_url option to Quick Start example

It took me a lot of digging to figure out how to add the
`:default_url` option, but it seems a common option that many
people will need to modify. Putting it anywhere in the README
will help those who just cmd-F on the page, like me.