Double Shot #900

Continuing the march to #1000...

• About the composed_of removal - Some insight into the Rails development process.
• action.io - Rails development environment in the browser. Now taking beta signups.
• Ubuntu 12.04 Ruby on Rails Development Environment - Zero to all the bells and whistles.
• happy 0.1.0 - "The happy web application toolkit," another framework for Rack-based web applications.
• QA/Desktop Firefox/GetInvolved/Tasks - Roadmap to getting involved with helping out Firefox development.
• Clockwork - Ruby process designed to replace cron for web applications.