1.28.0 (May 9, 2015)

• Require spec/support files in a certain order
• Use rack-canonical-host
• Swap id="flash" for class="flashes" in _flashes.html.erb
• Provide EXECJS_RUNTIME env variable (Node, as in Heroku)
• Removes .css file suffix from application stylesheet
• Add mention of Autoprefixer Rails gem to readme
• Use ruby 2.2.2
• Update gems