Issue #750

This is just an IntelliJ refactor, using EventBus in place of
DMDircMBassador whenever possible.

Stop swimming against the tide and accept what most of the rest of
the world does.

While it adds an annoying depth to the actual source code, it makes
the root directory nicer (no more 'test-res' dirs), means we don't
have to override the gradle config, and makes it nicer to work in
IDEA 2016.1.

The parser now uses the new API too, so we don't need to
do horrible things to convert.

Java 8 introduces a sane API for dates; to store datettimes
we should now be using LocalDateTime.

Stop ChannelListModesRetrieved being displayable - not sure
why it ever was, we don't have a formatter for it.

This, uh, breaks some channels a little. Will fix in a follow-up.

Add support for Optionals in the event property manager.

We no longer need to be consistent with the odd casing/naming
of actions.

Everything handled by the event formatter is now soley done
based on that.

  - Also by AutoValue Topic
  - Also make getUser in Topic Optional

Fixes #120

Returning null is bad.

Change-Id: Ied14c2fb45e4fd4f761d3cc4f3f000e48f5f6fcb
Reviewed-on: http://gerrit.dmdirc.com/3905
Reviewed-by: Chris Smith <chris@dmdirc.com>
Automatic-Compile: DMDirc Build Manager

Move to util package. Add constants for standard priorities.

Change-Id: Id469276751d8a31f19690469540d2c5d07cbe3bc
Reviewed-on: http://gerrit.dmdirc.com/3827
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager

Change-Id: Id3cfa404a56528542120f79c969d992a5c183aba
Reviewed-on: http://gerrit.dmdirc.com/3771
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>

Change-Id: I2baa7e986ded54930093768238ed24cab8cf4bf7
Depends-On: I2cf35d5859c85c3609002f126241536fda5d588e
Reviewed-on: http://gerrit.dmdirc.com/3769
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>