Move to CDN that can auto update

Following up on the discussion in #191 by @jimaek of the possibility to use jsdelivr as the primary CanJS CDN: http://www.jsdelivr.com/#!canjs

With the [auto-update tool](https://github.com/jsdelivr/libgrabber) tool in place it would actually be pretty nice because it will automatically update whenever we tag a new release in this repository and won't have to worry about publishing it to a CDN.

@jimaek Could you let me know when jsdelivr is looking for beta testers? Also would this also work with certain branches (we have `minor` for pre-releases)?

Start by reviewing the discussion in issue #191 and the linked jsdelivr/libgrabber tool. Determine the required CDN migration and whether tagged releases and the minor pre-release branch are supported; the work is done when the repository's distributable files are automatically available through the chosen primary CDN.

Written by the indexing model from the issue text.