Don't minify if filename have .min in it
Don't minify if filename have .min in it

Sometimes minifying javascript file which already is minified, cause
problems.
Don' use ob_gzhandler() if zlib.output_compression ini option is set.

As stated in
http://php.net/manual/en/function.ob-gzhandler.php#refsect1-function.ob-gzhandler-notes.
Put in some comments for the new changes.