Deprecated imports

[Edorka]

Running manage.py runserver on a fresh project returns "Importing flask.ext.marshmallow is deprecated" and similar ones for flask_script and flask_sqlalchemy.

[damienkilgannon]

flask.ext.marshmallow >> flask_marshmallow, flask.ext.sqlalchemy >> flask_sqlalchemy ............. however flask-script has been discontinued and its replacement is flask-cli, however flask-cli it is not a drop in replacement!

[jorgelaranjo]

flask.ext.marshmallow >> flask_marshmallow, flask.ext.sqlalchemy >> flask_sqlalchemy ............. however flask-script has been discontinued and its replacement is flask-cli, however flask-cli it is not a drop in replacement!
@colekettler
flask_script should work. The two PR are failing tests, which I'd have to look into why but locally works as expected.

update:
grunt ci works fine locally and get 100% coverage