bundle_fu for JS/CSS concatenation/minimisation

One of the ‘best practices’ to speedup your site (suggested also by YSlow) is to minify/compress/concatenate in one file the JS and CSS files.

Rails 2.0 has a new feature for accomplishing this, as shown here.

However, Rails does not provide JS compression. The bundle_fu plugin comes in handy for this, autocompressing the JS files.
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