Improvement to files path generation:
- issues can now know if they're a TPB.
- display titles can be adjusted for the file-system vs. the screen.
- added an option to the `list` command to print suggested library paths.
Cache responses for a lot longer.
More attempts to make final comic paths cleaner.
TODO: Still need to try and fix some situations like "Locke & Key".
Don't sync existing files when the `new-only` flag is set.
Pass the `new-only` flag.
Print the reason for (re)creating the user settings.
Refactored entire API:
- better support for multiple services
- more service agnostic API
- better logging
Added DarkHorse service

(some things are probably broken)