Ensure module methods have unique names.

Dagger 2.0 appears to require each method in a module to have a
unique name. In some cases we've used overloads with the same name.

Also, remove a bunch of boilerplate javadoc.

Issue #601

Fix source of notice events.

We were raising notices as all coming from the local user, not
the person that sent the notice. This is... unideal.

Add some mode aliases for unreal.

Add basic test for PluginFileHandler.

Stop TabCompleter depending on CommandManager.

Tidy up plugin refreshing.

Add getPath utility method to JimFsRule.

This saves getting the FS and suffering the barrage of warnings
related to auto-closeable resources.

Remove error events and tidy up error management.

Move ProgramErrorAppender to logger.

Add a JUnit rule for using JimFS.

This means each test doesn't have to set it up and tear it down
manually (although only one actually did bother to tear it down :)).

Move update applying into the file handler.

Add a README.

Kick off some basic dev info by documenting the new error handling.

SLF4J Logging in the core.

Slf4j logging a few more things.

Change a couple of event bus error reportings.

Remove some more AppErrorEvents.

Remove some more AppErrorEvents.

Slf4j a few more bits.

Remove CallbackNotFoundException, tidy up Query.

Add logback to licences

Use slf4j for a few errors.

We don't need to reregister on nick change now, as we get all
the events anyway and filter them manually.