KCFinder for GetSimple 2.x

[SamWM]

Close to what worked for me.

I took out $this->config['uploadDir'] and $this->config['uploadURL'] (lines 62 + 63) from class/class_browser.php since they are set in config.php and you shouldn't really alter files from a third party a library if you can help it.

Set config.php $_CONFIG array item: 'uploadURL' => "/site/data/" (because not in root of site). As a result, did not need to change tpl/tpl__header.php.