Support for multiple keys tracking

[hritvi]

As now we have 3 keys, we can add tracking for each key by their names(as given by the bhawan in which they are supposed to be).

Such that: bot I have kb_keys Bot: Okay, now hritvi has kb_keys

bot who have keys Bot: kb_keys are with hritvi, rvb_keys are with kp, rajiv_keys are with vrongmeal