Fix in describe message
Add Checkbox spec to list of tests
Fix spec

The "should fire an 'action' event with the contents of the detail property" was testing a completely different behavior.
Add jsdoc for action event on AbstractRadioButton
Add event dispatching to MockDOM

Implemented addEventListener and dispatchEvent
Add keyPressEvent to MockDOM

Creates key events based on the KeyManager keys interface.
keyPressEvent("ctrl+a", target);
Fix grammar error on spec
Add AbstractTextField and tests