new bot changes

I have reworked the bot significantly. A lot of things have changed. Some things you won't care about, the others you might.

Nevertheless I list all the changes here for prosperity.

1. All commands now have a "!command help" command, even if they're not useful.
2. !botcommands now lists help text for every command.
3. Bot commands now take in a bot parameter rather than a message parameter.
4. The owner-only message has been standardised and consistent throughout every command.
5. The bot now has new commands: !season, !debug, and !refresh
6. !season handles the seasonal ranking stuff. It requires a subcommand which I will list below.
7. !season check <username> will check the user's ranking in the current ranking period.
8. !season rank <url> will add a URL to the seasonal database.
9. !season top <number> [condensed?] returns the current top <number> players in the ranking. Pass in "yes" to the last parameter
   if you want it in a single line rather than multiple lines. e.g. "!season top 16 yes" will give you the top 16 in a single line.
10. !season reset will remove all data from the season. Use !season top <number> before doing this because otherwise it'll be gone forever.
11. !debug command is meant for personal use -- it helps me debug the bot if issues arise obviously.
12. !refresh reloads the entire command set and the configuration. This means that when I work on the bot there will be less
    chances of it going down because I can just refresh it instead. Again, personal use mainly.

Due to how many changes there are, chances are something /might/ have broken. I went out of my way to make sure nothing did
but sometimes these things pop up.

With these changes in place I suspect that it will be easier to add more complicated commands in the future such as the long
awaited "!timer" command. However that'll happen when I have feel like working on the bot which is not often.