* Change state() to try/except to catch KeyError
When Tautulli is up but Plex is down, the API doesn't return a 'stream_count' key. This causes calls to state() to raise KeyError exceptions. The new code includes a try/except to catch the KeyError and return -1 signifying that the Tautulli API cannot talk to Plex
* Update tautulli.py
* Adds Tautulli as a sensor platform.
* Remove blank last line.
* Rewrite the platform to comply with review.
* Linting issues.
* Remove tailing newline.
* Corrected typo
* Correcte check_connection, removed wierd defaults, added line in imports, removed unused var, use the correct user list.
* Use dict[key] for required config options.
* Minor changes