Get Heroku apps and output their ruby versions.

gistfile1.rb

#!/usr/bin/env rvm-auto-ruby

heroku_apps = `heroku apps`
heroku_apps = heroku_apps.split("\n")
heroku_apps.shift
heroku_apps.map! {|item| item.split(" ")[0] }

heroku_apps.each do |app|
	ruby_version =  `heroku run "ruby -v" -a #{app}`
	p "#{app}: #{ruby_version.split("\n")[1]}"
end