The customRenderer attribute isn't read only

This attribute commented as read only on the API document,
but it was actually not read only. Fix #932.
Add test for HistoryHash _REGEX_HASH fix
Correct HistoryHash _REGEX_HASH and parseHash to allow for blank hash string properties.
Build HistoryHash
Update HistoryHash HISTORY.md
Merge branch 'patch-HistoryHash-blank-values' of git://github.com/blzaugg/yui3 into dev-master
Merge branch 'fix-932' into live-docs
YUI and Loader build for latest Gallery build
Merge branch 'dev-master' into dev-3.x
Added implementation of _isHidden for browsers that don't have hasAttribute. (ie 6,7) Fix #1080.
Moved updated _isHidden from node-ie to node-view.
Need to add the changes to node-view.
Build Calendar, no -min changes
Merge branch 'live-docs' into dev-master

Conflicts:
	build/calendar-base/calendar-base-coverage.js
Build Node
Merge branch 'dev-master' into dev-3.x
Build SimplyYUI