This will replace the two or three kludgy methods in CertificateManager
that currently validate hostnames. In the process it fixes some fun
problems that could arise if the subject of a certificate contained
regex quote sequences (\Q...\E).

Issue #806

When the user manually trusts a certificate, we should be storing
the whole cert instead of just an encoding of its fingerprint.

This allows us to display it properly, chain other certs trusted
by it, and generally do everything more sanely.

Baby step for issue #806

Issue #750

Issue #750

Closes #755

Closes #757

Closes #751

The styliser needs an interface extracting into the API, and
we don't really want huge static methods defined on that.

Mockito now errors if a mock is unnecessary, plus a few other minor
API changes.

Some other minor tidying to Styliser.

Rename the private implementation to ConfigBinderImpl, and
make ConfigBinder itself an interface.

This shouldn't be exposed. Internal classes switch to using
the full class rather than the interface, so they can carry
on accessing the removed methods.

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.