Injected service in abstract controller is accessible from descendants.

https://github.com/kyoken74/gwt-angular/issues/14
We still need to migrate BinderFactory so that parent classes' public
fields are bound to the $scope of descendants.
Merge branch 'develop' of https://github.com/kyoken74/gwt-angular into develop

Conflicts:
	gwt-angular-core/src/main/java/com/asayama/gwt/angular/rebind/AbstractFactoryGenerator.java