This imports a Python version of Douglas Crockford's JSMin.  JavaScript files can annotate that they want to be run through the minifier.  Currently debug and mirror are minified.

This results in ~12k savings on the final binary size.

Review URL: http://codereview.chromium.org/19013


git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@1179 ce2b1a6d-e550-0410-aec6-3dcde31c8c00