Fix some unused code issues.

Rename PMD ruleset, update PMD.

Codacy looks for ruleset.xml, so give it what it wants.
Bump PMD version to the one used by Codacy, for consistency.

Add support for sending coverage to codacy.

Update copyright for 2017

Ignore iml files from idea

Fix a couple of issues with closing channels.

- GroupChatManager never subscribed to the event bus
- Comparing Optional<Connection> to Connection fails

Closes #782

Allow specifying a window for DisplayableEvents in format.yml (Issue #459)

Apply display properties to a value before running functions on it.

Make saveconfig save more than just identities. Issue #15

This allows "unstyled" to actually work.

Closes #755

I'm sure this will be changed/redone, but this is at least a start by allowing
certain events to go to all windows (eg ServerNotices)

Ideally it would be possible for some events to only be displayed in the window
that generated them (eg if I do /notice foo bar the ">-{{target}}-> {{message}}"
message only appears in the window I ran the command in, not either just the
server window or all the windows, but this would need changes to a bunch of
events to make them include a source window.

Fix errors from previous commits.

Add /reloadformat command.

Fix some unused imports/fields/etc.

Move config provider tests to the right place.

Remove legacy default colour behaviour.

We now specify the default colour using display properties, not
by ascribing special value to the first colour code in a message.

Closes #741

First pass at a style guide.

Remove config dependency on ClientInfo.

Move Migrator and LifecycleController to bundles.

Add some more bundles

Move config bindings into a bundle.