Build process tidying.

- Execute coveralls as part of tests, not afterwards
- Update script to plugins version to allow for files that don't exist
- Use jcenter for DMDirc plugin, to stop idea complaining

Narrow some scopes for some variables.

Create a TrustingTrustManager instead of an AIC.

Ensure client modes are non-null.

Fixes #82.

Use nifty separate handlers.

Add JUEL.

Add support for away messages in whois replies.

Add a method to get all info in UserInfoEvent.

Add a whois reponse handler.

Just does ircu stuff for now.

Add a couple more enum entries.

Add the start of a UserInfoEvent.

Use fake clients in a couple of places.

Add defensive checks to all events.

These need to be rewritten as proper unit tests.

Assert that things aren't randomly null. This will make it easier
to fix than trying to hunt down obscure errors in the client caused
by nulls here.

Remove CallbackManager hacks.

Stop doubly-unwrapping exceptions :/

Fix parser errors.

Start using dagger.

Remove unused circular dep, tidy tests.

Remove all tests that depend on TestParser - they're rubbish and
need to be completely rewritten to be proper unit tests.

Delete callback interfaces.

Ignore tests, hopefully, // TODO: FIX.

Remove install methods on default handlers.

Make callback manager an eventbus.

Publish events.

Remove unused logging thing.