Explictly sets the prefix when building node
railties is a better indicator of the rails gem

people are building rails apps that don't include the rails
meta gem. railties is not used outside of rails and can be
used to indicate the version of rails being used.
check that the Gemfile + Gemfile.lock exist before trying to read those files
rails 2 doesn't have railties
bump to v53
update changelog
Cache fetched bundler and parsed bundle.
init
Realize the bundle if bundler_path is called before bundle.
Really just one instance of things.
Less magic.
upgrade to bundler 1.3.2
bump to v54
update changelog
Revert "upgrade to bundler 1.3.2"

This reverts commit 4091c08b58eecbbdff0288c8723522e9b08c541d.
bump to v55
update changelog
Revert "Revert "upgrade to bundler 1.3.2""

This reverts commit 3fc9718e47cff36e30acc4c305994cff75c19f14.
require psyched_yaml in the syck hack
ruby 1.8.7 doesn't autoload rubygems