Respond to ngDisabled directive on the ui-switch element.
Revert "Respond to ngDisabled directive on the ui-switch element."

This reverts commit 7607316fce78a68c32359bad7c00347b841b135f.
Respond to ngDisabled directive on the ui-switch element.
Use angular.element wrapper to remove the element (to support older browsers).
Merge pull request #15 from jfrumar/master

Respond to ngDisabled directive on the ui-switch element.