Fix bug ZKCAL-38: Problems when toggling "readonly" on ZK calendar

git-svn-id: http://zkcalendar.googlecode.com/svn/trunk@162 8cb44ea2-eec7-11de-a004-2f18c49ebcc3
Fix bug ZKCAL-38: Problems when toggling "readonly" on ZK calendar

git-svn-id: http://zkcalendar.googlecode.com/svn/trunk@163 8cb44ea2-eec7-11de-a004-2f18c49ebcc3
Fix bug ZKCAL-39: dragged event in month mold disappears (when preventing update)

git-svn-id: http://zkcalendar.googlecode.com/svn/trunk@164 8cb44ea2-eec7-11de-a004-2f18c49ebcc3
update release note

git-svn-id: http://zkcalendar.googlecode.com/svn/trunk@165 8cb44ea2-eec7-11de-a004-2f18c49ebcc3