For #662, it makes sense to have a standard way to
get the source from events we may wish to filter.

This introduces a SourcedEvent interface, and adapts classes
to use it.

Java 8 introduces a sane API for dates; to store datettimes
we should now be using LocalDateTime.

Now everything is using events, we don't need the legacy
format identifier.

Issue #426

Formats defined in YAML can specify 'timestamps: false' to hide
the default timestamp for lines associated with that event.

Closes #633

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

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

Start to move FrameContainers behind an iface so they can be
pulled out.

For now, just cast back when needed.

Start to move FrameContainers behind an iface so they can be
pulled out.

For now, just cast back when needed.

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

Add support for Optionals in the event property manager.

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

"Death is nothing, but to live defeated and inglorious is to die daily."

Happy new year! :)

Drop the /notify command, as manually setting it doesn't make
sense in a post-actions world.

Drop the action component because they're now useless.