Minify (removal of all comments and extra whitespace)

Would it be possible to include this class (or letting people use download it and let the module use it if available) http://joliclic.free.fr/php/javascript-packer/en/

In my own code I've added include_once at the top of the module and below the line:

        $contents .= ";\n/* AGGREGATED JS FILE: $scripts_js_file */\n".$data."\n";

I added the following:

$packer = new JavaScriptPacker($contents, 'Normal', true, false);
$contents = $packer->pack();

UI wise it could be an option in the performance page which is greyed out if the packer class isn't downloaded, and when it is downloaded you could elect to use the class on the final file before saving (like I placed it after the current versions system).