Direct user feed

[lladdy]

Allow the user to request a direct feed messaged to them of bot results for a specific bot they're interested in at the time.

Useful for when you're monitoring a recent bot upload and want to see it's initial progress without sitting on the website.

Example usage:

!feedme mybotsname - initiate the feed for "mybotsname"

mybotsname just lost vs opponentbot1 in this match: https://aiarena.net/matches/XXXXXXX/ (type !stop to stop)
mybotsname just won vs opponentbot2 in this match: https://aiarena.net/matches/XXXXXXX/ (type !stop to stop)

!stop - stop all feeds