Add launcher specific stuff

config/general.php

@@ -1,5 +1,6 @@
 <?php
 $latestVersion = "1.5.2";
 $latestBetaVersion = "1.6-dev";
+$latestLauncherVersion = "1.0.0";
 $allowedVersions = [$latestVersion, $latestBetaVersion];
 $allowedDatabaseVersions = [$latestVersion, $latestBetaVersion];