CHANGELOG BETWEEN v2.7 AND 2.9

-admin/ajax/checkOldPassword.php
-admin/ajax/saveSlot.php
-admin/class/admin.class.php
-admin/class/calendar.class.php
-admin/class/category.class.php
-admin/class/holiday.class.php
-admin/class/lang.class.php
-admin/class/list.class.php
-admin/class/mail.class.php
-admin/class/reservation.class.php
-admin/class/settings.class.php
-admin/class/slot.class.php
-class/calendar.class.php
-class/category.class.php
-class/holiday.class.php
-class/lang.class.php
-class/list.class.php
-class/mail.class.php
-class/reservation.class.php
-class/settings.class.php
-class/slot.class.php
-index.php
-js/wach.calendar.js
-js/wach.calendar.min.js