Fix bug in db:seed
Improve seed comment API
Clean up method API on User
Add completed exercises to user in db:seed
Never return an array of languages from User#random_work
Refactor seed generator
Move auth helpers into auth controller
Delete unused helper method
Only nitpick completed exercises

This reverts the experiment where people could go nitpick the exercise
they're currently on.
Fix buggy completed list in API
Remove unused code
Use :github and :tag and keys for gems on github
Move newrelic_rpm into production group in Gemfile
Merge pull request #764 from iHiD/tidy_gemfile

Use :gitub key, :tag key, and production group in Gemfile
Merge branch 'master' of github.com:kytrinyx/exercism.io into refactorings