elfassy/simple_dragonfly_preview — pull request #8 by johnhamelink (2014-06-01 12:12:43+00:00)
Title: Allow configuration of default image URL

I've added a bit of boilerplate that allowed me to set a default image instead of the hardcoded default. An upgrade to this version should require no changes for the user, but if they add a configuration block they'll be able to make changes.

[I've followed the configuration pattern from thoughtbot.](http://robots.thoughtbot.com/mygem-configure-block)