change default rvm ruby installation to ruby 2 p247
change default rvm ruby installation to ruby 2 p247

wendorf/sprout-osx-apps,wendorf/sprout-osx-apps,wendorf/sprout-osx-apps,pivotal-sprout/sprout-osx-apps,pivotal-sprout/sprout-osx-apps,pivotal-sprout/sprout-osx-apps