This replaces the old general.showrawwindow setting.

Closes DMDirc/DMDirc#753

This is an implementation detail that won't be in the API.

This is an implementation detail, and it doesn't make sense to
expose it in an interface for everyone to access. The only use
of it outside of the config system is in debug displays.

This is just an IntelliJ refactor, using EventBus in place of
DMDircMBassador whenever possible.

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.

In preparation for child eventbusses being removed, anything
trying to subscribe to specific windows now needs an explicit
check.

In the process, fixed two issues:

- channel who plugin was sending way too many requests - each
  connection was querying every channel in the client. i.e.,
  with 5 servers open there'd be 5 WHOs per channel...

- ServerFrame stops itself listening when *any* frame is closed.
  So closing a channel window then reconnecting wouldn't offer
  an SSL dialog, because it's already unbound the listener.

Issue DMDirc/DMDirc#662

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

Migrate all users to using the InputModel.

Issue DMDirc/DMDirc#426

DMDirc/DMDirc#426

With the removal of message sinks, the active window plugin has
nothing to do now. We can reimplement it much more simply
directly as part of the Swing UI.

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

For now, just cast back when needed.

Closes #207