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: I4e9a1bff765c0bd62caf284a028932cd8461632c
Reviewed-on: http://gerrit.dmdirc.com/3772
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>

Change-Id: I2cf35d5859c85c3609002f126241536fda5d588e
Depends-On: I2baa7e986ded54930093768238ed24cab8cf4bf7
Reviewed-on: http://gerrit.dmdirc.com/3770
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>

Change-Id: If9b36c1b183dd48a0bd48d4faa78942abb884535
Reviewed-on: http://gerrit.dmdirc.com/3716
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>

Change-Id: If1eca66cc2fa340e653b7f74f7a4948a9c47dbd1
Reviewed-on: http://gerrit.dmdirc.com/3708
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>