Code Climate and RootOrg Refactor

- Add the code climate test coverage gem
- Refactor the RootOrg's descendants method (so much better)
Additional Validations and Spec Refactoring

- Added the uniqueness validations for user and org
- Cleaned up the denied_orgs association
- Call org name as block for beter randomized names
- Clean up org factories to better use traits and inheritance
- Replace instances of class names with described_class
Remove trailing whitespace
Add lazy style attribute to user factory
JSON API

- Users Controller (index, show)
- Orgs Controller (index)
- Rack::Cors gem to allow cross site scripting
- ActiveModel::Serializer for better JSON serialization
  (http://robots.thoughtbot.com/better-serialization-less-as-json)
- Link to the JSON API Docs at kata-docs.simian.us
Org Serializers

- Add org_ids to the user serializer
- Add the Org subclass serializers