ndbroadbent/turbo-sprockets-rails3 — pull request #101 by austinrfnd (2014-11-15 00:04:11+00:00)
Title: Fixing ticket #90.  Where if Rails.assets.cache is nil Rake assets:cache it throws an exception

The code was taken off @tdwalton's issue #90. Adding a unit test for the error. I left the version number the same.