Delayed/Trigger messages

[sjrct]

Similar to the greeting module, it could be neat to register a message with Hal such that on an event, (time delay, log on, log off, etc) that message is sent.

For example:

alice: !when logon bob Don't forget the quaz boots!
*alice leaves the room
*bob enters the room
Hal: for bob from alice: Don't forget the quaz boots!

[richteer]

Hmm... this would probably require implementing handlers to pass through other presence information to the registered modules. Possibly consider bucketing modules such that only those registered to receive certain information do, rather that try to send it to all of them?