Fixed timezone warning by adding timezone config option

models/base.php

@@ -17,7 +17,7 @@ require __DIR__.'/schema.php';
 abstract class Base
 {
     const APP_VERSION = 'master';
-    const DB_VERSION  = 3;
+    const DB_VERSION  = 4;
     const DB_FILENAME = 'data/db.sqlite';
 
     private static $dbInstance = null;

models/schema.php

@@ -2,6 +2,14 @@
 
 namespace Schema;
 
+function version_4($pdo)
+{
+    $pdo->exec('ALTER TABLE config ADD column timezone TEXT');
+
+    //set default timezone to UTC
+    $pdo->exec('UPDATE config SET timezone = \'UTC\'');
+}
+
 function version_3($pdo)
 {
     $pdo->exec('ALTER TABLE projects ADD column token TEXT');