Update selector.html
Update selector-css2.js
Fixes #973: 'valuechange' event e.stopPropagation

'valuechange' event now supports e.stopPropagation() and
e.stopImmediatePropagation().
Further 'valuechange' event fixes.

Fix tests according to rgrove's comments.

Consider the condition in which there are two listeners on the same
element and added test for it:
Listener 1 calls e.stopPropagation(),
Listener 2 calls e.stopImmediatePropagation()
Update event-valuechange history.
Build event-valuechange.
Merge branch 'patch-3' of git://github.com/ziggyism/yui3 into dev-master
Update dom history.
Build selector-css2.
Merge branch 'master' of github.com:yui/yui3