Starting to work on the promise failure.

https://github.com/kyoken74/gwt-angular/issues/22
I got promise failure to bubble up. Notify is next.

https://github.com/kyoken74/gwt-angular/issues/67
Working on the progress notification. It still does not work.

https://github.com/kyoken74/gwt-angular/issues/22
Updated the promise example text.

https://github.com/kyoken74/gwt-angular/issues/22