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.

Revert "Put CallbackManager behind an interface."

Add dependencies.

Put CallbackManager behind an interface.

Use mockito-core not -all.

Add XMPP Parser (From plugins.)

Add a sendWhois command to the parser.

Expose getChannelClients in ClientInfo.

Delete all the ant stuff.

Make jacoco/coveralls aggregate reports.

Subprojects need to gather but not report.

Add jacoco and coveralls.

Build file improvements.