Actions shouldn't be exposed on disabled controls [aria-impl]

For ARIA Implementation Guide
at http://www.w3.org/WAI/PF/aria-implementation/#Actions

I don't think we should expose an action if it has aria-disabled or 
has been disabled via the native markup.

Also, a good editorial change would be to fix the bulleted list 
above the table to say what the action name for clickable items or 
xlinks are ("click" or "jump"), e.g.:
    * If element has registered 'click' event handler, expose 
actionwith name  "click"
    * If element is xlink, expose action with name "jump"
    * If element has an ARIA role with an associated action name, 
use that action name (see the following table)

- Aaron