fixes #2533165 slider unit test fails in IE9
Add more graphics unit tests.
Merge branch 'dev-master' into trac2533210

Merge dev-master into topic branch.
Remove _closePath test due to inconsistencies between implementation.
Merge branch 'trac2533210' into dev-master

Graphics tests.
Merge branch 'dev-master' of github.com:yui/yui3 into dev-master
Travis and package updates