It doesn't make sense to have a public method in Connection to
muddle around with how queries are tracked, nor for queries to
tell servers when they change (creating a dependency loop).

Instead, have the ServerEventHandler tell Server.

Stop swimming against the tide and accept what most of the rest of
the world does.

While it adds an annoying depth to the actual source code, it makes
the root directory nicer (no more 'test-res' dirs), means we don't
have to override the gradle config, and makes it nicer to work in
IDEA 2016.1.

Migrate all users to using the InputModel.

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

We don't need to reregister on nick change now, as we get all
the events anyway and filter them manually.

For some reason we're checking hostname (e.g. dmdirc.com)
against full hosts (e.g. chris!ident@dmdirc.com) and expecting
them to match.

Queries now check on nicknames.

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.

Only one place in the core needs the silly IRC format, so just
inline it there.

From everywhere.

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

Doesn't make sense to have this any more, as Chat provides the
common interface between queries + channels.

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

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

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

Also remove some more parseHostname calls.

Returning null is bad.

Change-Id: I0bb97a8946d1c217de82fe2a9b8f35b7d49eae06

It doesn't really make sense in ui.core now it's doing more...
The classes it's integrating are all in messages.

Urgh.

Deprecate getConnection, fix CustomWindow's getOptionalConnection
returning null, change a couple of usages.