order of OSX autolibs had not changed in docs

Just noticed that I was warned that the default was now (1.24) `homebrew`, but the help message / docs still said otherwise.
Merge pull request #2369 from teoric/patch-1

order of OSX autolibs had not changed in docs
fix detecting ruby directive in Gemfile, fix #2372
Merge branch 'master' of github.com:wayneeseguin/rvm