Document & make use of new info_log() to help troubleshoot issues
- Info level logging is enabled by default since it has very low
verbosity except in cases that probably deserve poking into.
- Update a few logging calls to info_log() as an example.
Add error handling & logging to raidpicture, fallback pokemon icon
- Use the new info_log() to provide useful hints when pokemon icons are
missing
- Revamp fallback image handling so that even unknown raid levels get at
least some icon, avoiding spurious errors
- Icon is under the Pixabay License: https://pixabay.com/vectors/pokemon-pokemon-go-pikachu-figure-1574006/
Document & make use of new info_log() to help troubleshoot issues
Add error handling & logging to raidpicture, fallback pokemon icon