jquery/jquery-ui — pull request #1369 by arschmitz (2014-10-22 13:50:11+00:00)
Title: All: Classes Option

This replaces PR #790 It updates the widget factory to handle the classes option via setOption, and updates all the widgets to use the `_elementsFromClassKey` method to set what elements belong to what classkeys for programmatic updating. It also updates all classes options to use `""` instead of `null` to make it easier to concant new classes.