Whitespace
Update dependencies

Move development dependencies into the gemspec and update the Rails
dependency to not include 4.x (for now).
Colorize rspec output
Load `factory_girl_rails` in `spec_helper`
Move `spec/integration` to `spec/features`

Makes tests compatible with capybara 2.x
Require pry in spec_helper
Use `page.body` which preserves new line characters and whitespace
Handle deprecation messages
Setup appraisal gem

Run against 3.0.x, 3.1.x, 3.2.x of rails
Update gem dependencies

Ensure tests pass using the latest dependencies. Add `appraisal` gem to
test against all 3.x versions of Rails.