added destroy callback
added destroy callback

git-svn-id: ac804e38dcddf5e42ac850d29d9218b7df6087b7@460397 13f79535-47bb-0310-9956-ffa450edef68

aldaris/wicket,klopfdreh/wicket,mafulafunk/wicket,aldaris/wicket,bitstorm/wicket,apache/wicket,martin-g/wicket-osgi,astrapi69/wicket,zwsong/wicket,aldaris/wicket,mosoft521/wicket,freiheit-com/wicket,mafulafunk/wicket,selckin/wicket,bitstorm/wicket,zwsong/wicket,freiheit-com/wicket,dashorst/wicket,Servoy/wicket,AlienQueen/wicket,martin-g/wicket-osgi,freiheit-com/wicket,dashorst/wicket,topicusonderwijs/wicket,freiheit-com/wicket,klopfdreh/wicket,AlienQueen/wicket,apache/wicket,zwsong/wicket,mosoft521/wicket,apache/wicket,dashorst/wicket,Servoy/wicket,AlienQueen/wicket,selckin/wicket,topicusonderwijs/wicket,selckin/wicket,aldaris/wicket,aldaris/wicket,dashorst/wicket,topicusonderwijs/wicket,mosoft521/wicket,topicusonderwijs/wicket,Servoy/wicket,klopfdreh/wicket,astrapi69/wicket,bitstorm/wicket,mosoft521/wicket,mosoft521/wicket,klopfdreh/wicket,apache/wicket,selckin/wicket,mafulafunk/wicket,astrapi69/wicket,AlienQueen/wicket,bitstorm/wicket,dashorst/wicket,selckin/wicket,martin-g/wicket-osgi,zwsong/wicket,freiheit-com/wicket,topicusonderwijs/wicket,bitstorm/wicket,astrapi69/wicket,AlienQueen/wicket,apache/wicket,klopfdreh/wicket,Servoy/wicket,Servoy/wicket