AUI-1356 focusInvalidField uses the wrong css class to get error field
AUI-1356 Use .form-group instead of .control-group on Bootstrap 3
AUI-1356 Set appropriate ARIA attributes
AUI-1356 Make error messages more precise
AUI-1356 Set aria-describedby on input field instead of target
AUI-1356 Include field label text in error message
AUI-1356 Source formatting