Add basic addressee tracking and various other stuff

If you greet someone (with a known greeting) or say someones name at the beginning
of a message, even your own name, bots will think you're talking to them.

Bots now only respone if sender last addressed message to 'anyone' or them.
Bots now respond if you just say their name (instead of giving unable to parse message).
Bots now reply to greetings directed at everyone. "Hi everyone", etc.
Bots now reply to "Anyone know what ..." messages.
Bots now replace "my" with "your" when repeating topics. ("Lets talk about me instead of your life problems.")