force UTF-8 encoding
Merge pull request #448 from indirect/cred_helper_encoding

force UTF-8 encoding in credential helper
Remove node v0.4 because it fails on 10.9
Merge pull request #455 from boxen/remove-node-0.4

Remove node v0.4 because it fails on 10.9
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