This allows events to iterate over a collection property, and
adds formatting for whois results. It needs a lot of tidying,
but it's a start...

This allows us to remove a fair chunk of the notification
handling functionality in FrameContainer.

Issue 426

I tested this well.

Stop ChannelListModesRetrieved being displayable - not sure
why it ever was, we don't have a formatter for it.

Removes some usages of server.parseHostMask which needs to die.

This, uh, breaks some channels a little. Will fix in a follow-up.

Add support for Optionals in the event property manager.

Group them by function so the file is a bit easier to navigate.
Use nice syntax for multi-line topic format.

Also add function to do bracketed crazyness for events with reasons.

We no longer need to be consistent with the odd casing/naming
of actions.

Use this in the new formatter to avoid having object hashcodes
all over the damn place.