Refactor specs + factories etc

- Add additional specs
- Refactor some specs
- Fix bug in feedback_reviews path
- config.around skipped feature specs
- Add guard
- require 'coffee_script' to avoid tilt error
- Refactor factories
- Bump capybara + rspec-rails
More specs now 100% coverage

Made settings spec less cryptic.
Revert to new "slug" and "friendly.find"