ARLChecker Initial Release

[hockeygoalie35]

Initial release to ARLChecker, addresses #133 .

ARLChecker.py:
Python script checks the validity of ARL token set in extended.conf. If the token comes back invalid, a (user-created) Telegram bot alerts them, and prompts for a new one. The bot functionality is disabled by default. A wiki entry will be added on how to create an Telegram bot. The user can scan the logs or run the checker manually to understand the current status (wiki entry to be made). As a fallback, a text file is updated with the status of the token, so the user can go in check if the suspect something's wrong. I would like to at some point leverage the Lidarr API to notify the user if that's possible.

ARLChecker (bash)
Bash script that runs ARLChecker.py with -c flag, then sleeps for interval set in extended.conf (default 24h)

Other changes to support this feature:

• Create new directory 'python' in custom-services.d to prevent py script from auto-running (incorrectly).
• Added relevant parameters in extended.conf
• Fix a couple typos in extended.conf
• Add to Read.me ARLChecker as feature.
• Add colorama and python-telegram-bot to pip install in setup.bash
• Add auto-download of ARLChecker Bash and .py to setup.bash

Future improvements:

• Better extended.conf parsing
• Better notification without relying on logs or Telegram bot if user chooses not enable it.
• General cleanup. I don't like the way the original Deezer login class works.
• Wiki entries for this functionality and Telegram bot creation.

Feedback and suggestions welcome.