* ask user for timezone on install

* remember status of the installation
* moved clients list to the new file
* verify if client and timezone is correct on install

system/clients.conf.php

@@ -0,0 +1,78 @@
+<?php
+/**
+ * List of clients
+ *
+ * @package   MyAAC
+ * @author    Slawkens <slawkens@gmail.com>
+ * @copyright 2017 MyAAC
+ * @link      http://my-aac.org
+ */
+defined('MYAAC') or die('Direct access not allowed!');
+
+$config['clients'] = array(
+	710,
+	740,
+	750,
+	760,
+	770,
+	772,
+	780,
+	792,
+
+	800,
+	810,
+	821,
+	822,
+	831,
+	840,
+	841,
+	842,
+	850,
+	852,
+	853,
+	854,
+	855,
+	857,
+	860,
+	870,
+
+	900,
+	910,
+	920,
+	930,
+	940,
+	942,
+	944,
+	946,
+	950,
+	952,
+	953,
+	954,
+	960,
+	970,
+	980,
+
+	1000,
+	1010,
+	1021,
+	1031,
+	1034,
+	1041,
+	1050,
+	1053,
+	1054,
+	1058,
+	1075,
+	1077,
+	1079,
+	1080,
+	1090,
+	1093,
+	1094,
+	1095,
+	1096,
+	1097,
+	1098,
+	1100,
+);
+?>