Fix bug ZK-1711: Chosenbox's model will be set to null after invalidate the Chosenbox's parent
http://tracker.zkoss.org/browse/ZK-1711
fine tune API naming
Fix bug ZK-1714: Databinding 1 cannot clear selection item
http://tracker.zkoss.org/browse/ZK-1714
Fix bug ZK-1715: The disabled listitem shall not be selected when use SHIFT + DOWN key with a paging listbox
http://tracker.zkoss.org/browse/ZK-1715
Merge remote-tracking branch 'VincentJian/B65-ZK-1715'
new 7 cases
Merge pull request #17 from huangnoah/new-20130412

New 20130412
minor tune
Merge branch 'master' of github.com:zkoss/zk