Added PHP 7 check in installer and updater.

Till Brehm

2016-04-22 ebd0e986ed11f2a34fb58cdd33efbfab192083ad

 interface/web/sites/lib/lang/en_shell_user.lng

@@ -2,7 +2,7 @@
$wb['puser_txt'] = "Web Username";
$wb['pgroup_txt'] = "Web Group";
$wb['shell_txt'] = "Shell";
$wb['dir_txt'] = "Dir";
$wb['dir_txt'] = "Base Dir";
$wb['server_id_txt'] = "Server";
$wb['parent_domain_id_txt'] = "Site";
$wb['username_txt'] = "Username";