Remove unused DisplayableEvent properties.

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

Assorted tidying.

Assign IDs to windows.

This allows windows to be uniquely identified and shared with
clients that are running outside of the DMDirc process (e.g.
a web UI, or a remote instance).

Separate Server and FrameContainer.

Separate InputModel functions from FrameContainer.

Remove input methods from WindowModel.

Migrate all users to using the InputModel.

Introduce a model for window input.

Instead of WindowModel defining lots of methods on the off-chance
that the window is writable, pull them all into a separate
optional InputModel.

For ease of transition, FrameContainer will just implement both,
but eventually the input handling should be pulled out into
its own class.

Remove FrameContainer parent/child fields.

Remove usages of FrameContainer window methods.

These will be going away shortly.

Make the WindowManager track windows.

Despite its name and description, the WindowManager relied on
each FrameContainer having a reference to its parents and all
its children.

The WindowManager now stores this information itself, and so
the FrameContainer methods can be gradually phased out.

Remove ramaining addLine methods.

Closes #426

Add events for sent messages/ctcps/notices/raw lines.

Use events in ShowTopic command.

Remove another deprecated method.

Use events for raw data in/out.

Issue #426

Remove some unused methods.

Add display property to suppress timestamps.

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

Closes #633

Fix some build warnings.

Use the right annotation to subscribe.

Make LogUtils more robust.

Also make event bus errors have a better message.

Closes #627

Allow plugins to specify event formats.

Closes #622

Use snapshot version of raven, send relase.

This enables release tracking in sentry.

Propagate exceptions sanely.

Use the new MutliEventFormatProvider.

Issue #622