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.

* Move all plugins to their own top-level directories.
* Move resources out of source trees
* Add Gradle build scripts.
* Remove ivy and ant build scripts.

Change-Id: Ib69a48ef26800c174ccf51c84ff9d1f73529460f
Depends-On: I303b6b69518468f98d48d835b8f40135d9e4bcbf
Reviewed-on: http://gerrit.dmdirc.com/3850
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>

Change-Id: I34cf63e7b9307b35de53b48165e4ba71a50213ab
Reviewed-on: http://gerrit.dmdirc.com/3274
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>

Change-Id: I35bf8ce93d7be8fb714b1a58adc9dd66672ec717
Reviewed-on: http://gerrit.dmdirc.com/3124
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager

Change-Id: I3e4fd86a0d19f5167506df5986f7ec256b224820
Reviewed-on: http://gerrit.dmdirc.com/2979
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>

Change-Id: I4fd30159ea93503c7354d07739ffdcb6a1dedebb
Reviewed-on: http://gerrit.dmdirc.com/2629
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>
Reviewed-by: Greg Holmes <greg@dmdirc.com>