Responsive FileManager

[asemion]

After adding 2.5 to a new install, in plugins, when clicking install, I receive a simple "error" message.
Clicking anywhere else results in a blank screen. 

This issue is fixed. Add support for servers with PHP lower version than 5.5.
Also you can use such a code in the your gsconfig.php file:
define('GSEDITOROPTIONS', '
    extraPlugins:"thumb",
    filebrowserBrowseUrl:"../plugins/responsivefilemanager/dialog.php?type=2&lang=en_US&editor=ckeditor&fldr=",
    filebrowserImageBrowseUrl:"../plugins/responsivefilemanager/dialog.php?type=1&lang=en_US&editor=ckeditor&fldr=",
    filebrowserWindowWidth:"75%",
    filebrowserWindowHeight:"65%"
');

This option lets you use Thumbnail button and Responsive FileManager with all CKEditor instances which are used by other plugins (eg. News Manager and so on) without integration or source code modification.
Thank's Eric (islander) for this opportunity.