specify a osx 10.8.5 specific functional version of therubyracer per: http://stackoverflow.com/questions/10905820/gem-install-therubyracer-fails-on-mac-os-x-lion
Merge pull request #7 from diclophis/make-it-work-on-osx-10.8.5

specify a osx 10.8.5 specific functional version of therubyracer...