ScriptCallData.class, RecentScriptCalls.class});
registerConverter(UserDao.class, PFUserDO.class, 20);
registerConverter(GroupDao.class, GroupDO.class, 19);
registerConverter(TaskDao.class, TaskDO.class, 18);
xstream.registerConverter(new JodaDateTimeConverter());
xstream.registerConverter(new JodaDateMidnightConverter());
}