Allow easier running of multiple bots with different tokens from the same directory

[svioletg]

While I still want to have support for using one bot on multiple servers eventually, but for the time being only one bot can be playing on a server at a time to have everything work normally. The solution to this would be to make multiple Discord bots with separate tokens that you can invite to each server you want, and just run each in a separate terminal window or something like a screen if you're using a server OS. I'd like to more directly support being able to define separate configuration files for each one likely with a custom name, and you'd then be able to run your desired bot with its token & config like py bot.py my_server or py bot.py my_cooler_server or something.