asset_hat 0.4.0

Minifies, bundles, and optimizes CSS/JS assets ahead of time (e.g., on deploy), not at runtime. Loads popular third-party JS (like jQuery, YUI, and Ext JS) from localhost in development, and auto-switches to Google's CDN in production. Can rewrite stylesheets to use CDN hosts (not just your web server) and cache-busting hashes for updated images.