Fixed #831
Opera needs same special treatment as webkit for :checked selector
Merge branch 'fix831-opera-selector-checked' of git://github.com/asystance/yui3 into dev-master
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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()
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Merge branch 'patch-3' of git://github.com/ziggyism/yui3 into dev-master
Update dom history.
Build selector-css2.