added example using blueprints/factories

examples/blueprints/blueprints/__init__.py

examples/blueprints/blueprints/app.py

examples/blueprints/blueprints/config.py

examples/blueprints/blueprints/core/__init__.py

examples/blueprints/blueprints/core/views.py

examples/blueprints/blueprints/extensions.py

examples/blueprints/blueprints/foo/__init__.py

examples/blueprints/blueprints/foo/views.py

examples/blueprints/run.py

examples/groups/app.py