With numeric formatting gone, all output is either added direct
to a window (which will be changed soon) or done through
displayable events. Message sinks are now completely unused,
as they don't affect displayable events.

Issue #426

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

Issue 426

Instead of passing them in to the FrameContainer ctor, create
them afterwards.

This means the reference in FrameContainer can't be final but
removes the horrible setOwner() kludge that was previously in
CommandParser, and cuts down the deps needed to pass in to the
FrameContainer ctor.

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

For now, just cast back when needed.

(This depends on a plugins change)

These are just proxies to ChannelInfo for now.

Fixes DMDirc/Parser#62

From everywhere.

For some reason it reordered the ctor parameters, so fix them too...

Delete the duplicated methods from Connection.

Nicer than having Channel poke it explicitly.

For now this is just a straight(ish) copy of the way Server worked.
Need to make it use events in the future which should simplify it
quite a bit.

We now need it to exist independently of anything requesting it,
otherwise we miss lines being added.

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

Add support for Optionals in the event property manager.

Everything handled by the event formatter is now soley done
based on that.

  - Also by AutoValue Topic
  - Also make getUser in Topic Optional