Use lists not arrays.

This is required by the plugins change.

Raise certificate events.

Add events for certificate problems.

Issue #213

Move some logic into parser factory.

Switch IRCDocument over to timestamps.

Make Line aware of timestamps.

Not sure why we went for String arrays - all lines have a timestamp
and some text. Store this sensibly.

Make getParser() optional.

Returning null is bad.

Server tidying.

Make Raw optional, mark some fields as @Nonnull.

Move mode alias reporting out of Server.

Doesn't really need to be there, makes more sense as a separate
observer which can do its own thing.

Improve some optionals.

These are absent when disconnected, so use optional instead of null.

Left most of the calls as-is - if something assumed parser was
non-null before it assumes the optional is present now. Should be
easier to clean up later.

Make the formatter set the FG property for events.

More BackBuffer work.

- Only show each event once, don't propagate to servers.
- Use a setting to control whether it's enabled or not.

Remove old getConnection() and rename new one.

Add a way to specify event colours.

Fix various deprecated uses.

Change-Id: I0bb97a8946d1c217de82fe2a9b8f35b7d49eae06

Add invocation ability to ConfigBinder

Move BackBuffer to ui.messages.

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

Add back buffer entries based on events.

Switch action to use Paths.