Node.js v0.4 no longer provided by default

as of 2fc3983825
Merge pull request #457 from celkins/patch-1

Node.js v0.4 no longer provided by default
Add Node 0.10
Merge pull request #460 from pedrogimenez/update-readme

Add Node 0.10
set shebang in gem bins to system ruby
Merge pull request #471 from indirect/master

ensure bootstrap uses system ruby