Switch to Executors from TimerTasks.

Fix Away Messages.

Camel case ServerInviteReceivedEvent

Tidy up away states in Connection.

Separate most swing logic from core model.

This introduces a CachingDocument which wraps around an IRCDocument
and allows UI-specific caching of UI-specific styled lines (so, e.g.
the web UI could cache HTML versions if it wanted).

Also adds a delegating message maker and attributed string maker,
which incorporates the old "make a StyledDoc then change it into
an AttributedString" logic found in ui.core.util.Utils.

Hopefully this should mean all the the swing stuff can be punted
into the swing UI. The delegated maker will also allow colouring
of the new events to be done sensibly, I think.

Remove deprecated method.

Remove StyledDocument stuff from styliser.

Put it behind a nice interface, so the styliser can work without it
and be tested, and other UIs don't have to use swing junk.

Remove get/set ActionManager methods.

Stop installActionPack method being static.

Stop using ActionManager.getActionManager

Store display properties in Line.

Push more parser config into the factory.

Remover CertProblemListener.

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.