Make changes to make the gem Rails 4 compatible.  Remove ActiveResource reference.  Update gemspec to allow Rails 4.  Move alias_method_chain to the ActionView::Helpers::AssetTagHelper module.  Change the name of the spec controller to be Rails 4 compatible.  Remove deprecation warnings in specs.  Update Rakefile to include spec task and make it the default.
Merge pull request #14 from petergoldstein/feature/rails_4_support

Rails 4 Support and Travis Integration