Major Changes

Add ability to immediately remake cards after they've been watched (#194)
- Maker can now monitor (on a variable frequency) a file written to by Tautulli and immediately remake cards after they're watched
- Added --tautulli-update-list and --tautulli-update-frequency arguments
  - Also set via TCM_TAUTULLI_UPDATE_LIST and TCM_TAUTULLI_UPDATE_FREQUENCY environment variables
  - Specify file to monitor for what cards to remake
  - Specify how often to read that file (defaults to 2 minutes)
- For example, the following will check the specified file every 60 seconds for cards to remake:
```
$ pipenv run python main.py --tautulli-update-list /docker/tautulli/update.txt --tautulli-update-frequency 60s
```
Let card filename format be set per-series (#203)
- Specify as filename_format within series YAML (overrides global default), like so:
```
series:
  One Piece:
    year: 1999
    filename_format: "One Piece - S01E{abs_number:04}"
```
Add ability to get episode data from TMDb or Plex, in addition to Sonarr/TVDb (#97, #201)
- Specify globally and/or per-series with episode_data_source option, like so:
```
options:
  episode_data_source: plex
```
Get episode ID's as a part of the main run routine to improve episode matching on TMDb
- Episode ID's are now sourced from Sonarr, TMDb, and Plex (was just Sonarr)
Rename global source_priority option to image_source_priority

Major Fixes

N/A

Add Beedman/GradientLogoTitleCard user-submitted card to README (example of card below)
Add character replacements for "♡" and "☆" to AnimeTitleCard
Let Sonarr, TMDb, TVDb, and IMDb ID's be manually set within YAML (#200)
- Specify with sonarr_id, tmdb_id, or tvdb_id for a given series
- Specify with tvdb_id, or imdb_id in the datafile for a given episode
Pass episode watch status to CardType initialization (#204)
No longer require Sonarr URL to end in /api/v3/, this is detected/added automatically (#207)