Creating entities doesn't let me specify "just a Kind" #703
Description
To create a new Product entity, I have to do the following
from gcloud import datastore
product = datastore.Entity(key=datastore.Key('Product'))This seems unnecessarily long to me. How about
from gcloud import datastore
product = datastore.Entity('Product')or
from gcloud import datastore
product = datastore.Entity.from_kind('Product')or
from gcloud import datastore
product = datastore.Kind('Product')