Log Message:
Add Ruby Sprockets version 2.2.2 as ruby-sprockets22 which is part of
Ruby on Rails 3.2.9.

Sprockets: Rack-based asset packaging

Sprockets is a Ruby library for compiling and serving web assets.
It features declarative dependency management for JavaScript and CSS
assets, as well as a powerful preprocessor pipeline that allows you to
write assets in languages like CoffeeScript, Sass, SCSS and LESS.