yui/yui3 — pull request #321 by juandopazo (2012-10-22 19:44:59+00:00)
Title: First approach to Y.config.global

I'm copying what `Y.UA:nodejs` does because `Y.UA` it's not yet available.

I just have one open question: if somebody sets `YUI({ win:window }),` should `Y.config.global` change? I'm not sure it should, mostly because of the use case in Node where a YUI instance is created for jsdom.