Fix bots responding to reactions by users on other bots messages, to avoid multiple bots responding
Add a config option to always allow the bot to react and respond to it's own images, so that bots can exist in the same channel without them scanning other user's images, and avoid reacting and responding for each bot (only one bot should whitelist the channel to cover user images).
Unrelated, but fixed logs to open the logs file as utf-8, the encoding it is saved as, so that it can properly handle unicode characters.