__str__ on ListResource still calls count() #219
Description
Looks like ListResource.count() was removed, but str on the class still tries to call it.
This results in a raised exception, particularly for me within my exception handler, where I am attempting to parse out the stack frames of a given (in this case one from Twilio) exception. This means that my exception handler fails, and I don't get any insight about what's going on.
See: https://github.com/twilio/twilio-python/blob/master/twilio/rest/resources/base.py#L435
Let me know if there's anything I can do to help. I don't quite have the bandwidth to fork, make changes, and write tests at the moment.