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.
More charts test coverage.
Remove _closePath test due to inconsistencies between implementation.
Merge branch 'moretests' into dev-3.x

More charts unit tests.
Merge branch 'trac2533210' into dev-master

Graphics tests.
Merge branch 'dev-master' of github.com:yui/yui3 into dev-master
Install `grunt-cli` in devDependencies.

The `grunt` bin is provided by `grunt-cli`.
We need that bin in our postinstall script,
so locally install it for use on CI systems
that do not have a globally-installed grunt.
Travis and package updates
Merge branch 'dev-master' into dev-3.x