Growstuff/growstuff — pull request #366 by Skud (2014-07-06 10:38:55+00:00)
Title: Added rake task to add new crop wranglers

Also changed code for admin and crop wrangler to assume we already have
those roles set up, as they're part of db/seeds.rb

PT: https://www.pivotaltracker.com/story/show/73517276