jQuery CDN with Local Fallback

[philwinkle]

I propose we move to Google CDN version of jQuery to try to eke out some browser cache performance wins. We can still fall back to local jQuery in the case that GCDN is not responsive (no pun intended).

See below for more information:

http://magento.stackexchange.com/questions/3523/google-cdn-jquery-with-local-fallback-in-magento-layout-xml