Added PHP 7 check in installer and updater.

Till Brehm

2016-04-22 ebd0e986ed11f2a34fb58cdd33efbfab192083ad

 interface/web/admin/lib/lang/en_system_config.lng

@@ -65,4 +65,7 @@
$wb['customer_no_counter_txt'] = 'Customer No. counter';
$wb['session_timeout_txt'] = 'Session timeout (minutes)';
$wb['session_allow_endless_txt'] = 'Enable "stay logged in"';
$wb['No'] = 'No';
$wb['min_password_length_txt'] = 'Minimum password length';
$wb['min_password_strength_txt'] = 'Minimum password strength';
?>