Handle connection errors when streaming

Handle connection errors when streaming

Handle requests.ConnectionError, urllib3.exceptions.ReadTimeoutError, urllib3.exceptions.ProtocolError

Handling urllib3.exceptions.ProtocolError should handle the reraised/wrapped http.client.IncompleteRead connection error that can occur and resolves #237 and resolves #448

Handling urllib3.exceptions.ReadTimeoutError resolves #750

Handling urllib3.exceptions.ProtocolError should also handle the reraised/wrapped ConnectionResetError that can occur and resolves #1416