PHP 7 Compatibility

Hi !

Can you please fix the plugin to be compatible with PHP 7.

Message: PHP Error #8192: Methods with the same name as their class will not be constructors in a future version of PHP; wsMenuEditorExtras has a deprecated constructor

class ABC {
public ABC() { } // Don’t use this
public __construct() { } // Use this
}

Also don’t use reference in your ob_callback methods.

function ob_callback(&$buffer); // Don’t use this.
function ob_callback($buffer); // Use this.