Extract data from http website

Configuration
12

Maybe @fabaff and @DarkFox can provide some more advanced assistance.
The sensor is built to use username/password or none.

if username and password:
    if config.get(CONF_AUTHENTICATION) == HTTP_DIGEST_AUTHENTICATION:
        auth = HTTPDigestAuth(username, password)
    else:
        auth = HTTPBasicAuth(username, password)
else:
    auth = None