fix mvvm performance issue
Fix bug ZK-1480
http://tracker.zkoss.org/browse/ZK-1480
Fix bug ZK-1512: ListBox Select All
http://tracker.zkoss.org/browse/ZK-1512
add test case
release 6.0.4
update version to 6.0.5
Fix bug ZK-1531: Button with an image attribute will fire both click and rightClick events when right click the mouse in Chrome
http://tracker.zkoss.org/browse/ZK-1531
Fix bug ZK-1523
http://tracker.zkoss.org/browse/ZK-1523
Fix javadoc's typo.
Fix bug ZK-1381 on Chrome/Safari
Modify release note
Fix bug ZK-1524: use caption in window will cause hflex="min" doesn't work
http://tracker.zkoss.org/browse/ZK-1524
Fix bug ZK-1574: window vflex="min" calculate wrong height in tablet
http://tracker.zkoss.org/browse/ZK-1574
Fix bug ZK-1578: window hflex="min" not work
http://tracker.zkoss.org/browse/ZK-1578
Merge remote-tracking branch 'VincentJian/B65-ZK-1524'
Fix bug ZK-1572: Scrolling-Bug in Listbox with freezed columns with ie9
http://tracker.zkoss.org/browse/ZK-1572
Bug ZK-1524
Fix bug ZK-1572: Scrolling-Bug in Listbox with freezed columns with ie9
http://tracker.zkoss.org/browse/ZK-1572
Refix bug ZK-460: IE 6-8 issue
add release-note