Fails on authenticating dict based user

[menudoproblema]

To reproduce this bug you can use this authenticate function:

def authenticate(username, password):
    return {'id': '1', 'username': 'test', 'password': 'test'}

Trace:

File ".../lib/python3.5/site-packages/flask_jwt/__init__.py", line 53, in _default_jwt_payload_handler
    identity = getattr(identity, 'id') or identity['id']
AttributeError: 'dict' object has no attribute 'id'

[coveralls]

Coverage remained the same at 95.652% when pulling 030e870 on menudoproblema:master into c270841 on mattupstate:master.

[stephane]

Already fixed by #63 and so many others ;)

Updated after @dequis comment

[dequis]

@stephane I think you mean #63

[stephane]

Yes you're right