clearErrorsFor and more stable `failed` action

Two things in this release:

1. New action clearErrorsFor was introduced:

   import { clearErrorsFor } from '@foxcomm/wings';
   
   class Foo extends Component {
   componentDidMount() {
      this.props.fetchProducts();
      this.props.fetchTags();
   }
   
   componentWillUnmount() {
     this.props.dispatch(clearErrorsFor('fetchProducts', 'fetchTags'));
   }
   }
   
   export default connect()(Foo);

2. Fixed failed action, now it doesn't depend on payload reducer for your async action.