Can find mcrypt in PHP 7

Hi Alex, it took some re-installs, mostly because me being silly by not following every step in the manual installation guide written by @michael (XIBO step by step Installation IIS 8.5 on WINDOWS SERVER 2012), BUT by changing line 92-99 of lib/Helper/Environment.php from:

/**
     * Check PHP has the Mcrypt functionality installed
     * @return bool
     */
    public static function checkMcrypt()
    {
        return extension_loaded("mcrypt");
    }

into:

/**
     * Check PHP has the Mcrypt functionality installed
     * @return bool
     */
    public static function checkMcrypt()
    {
        return true;       /* was originally:   return extension_loaded("mcrypt"); */
    }

I managed to get through the installer and now seem to have a fully working, manually installed, Xibo CMS 1.8.11 running on Windows Server 2012 R2 with IIS 8.5 #yeah!

Looking forward to the 1.18.12 release though in which the mcrypt dependency will be removed so I can forget about this workaround :wink:

Thanks for your support / hint to get around the problem.