Merge pull request #138 from andyjeffries/master

Rails 4 combined asset loading now overloads existing combined assets
Merge pull request #141 from skinnyfit/fix_sprockets_check

Fixes assets:precompile for new Rails 4 apps: fix Sprockets check
Merge pull request #142 from jankeesvw/master

Updated Almond to 0.2.5 and Require to 2.1.8.