Restructure to standard maven/gradle layout.

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.

Update dependencies.

Add guava + auto value to util

Add a horrible unit test for StreamUtils.

Add @WillClose annotations.

Remove unused method.

Delete SimpleInjector.

Add some validator unit tests.

Remove DoubleMap.

Remove unused class.

Improve test coverage for Queued LinkedHashSet.

Remove WeakList et al.

Add a TriConsumer.

Put MapList to rest.

ConfigFile can manually do it - it's not that much more work.
Everything in DMDirc has been moved to use Guava's Multimap.

Use new plugins syntax.

Generate source and javadoc jars.

Issue #3

Add tests for StreamUtils.close.

Improve TextFile unit test, and remove unused ctor.

Few more tests.

Add a few more tests.

Add a couple of trivial tests.

Various build file updates.