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: Ibf3d23c723ce7cf8bbd9505b23966fdfdeda8911
Reviewed-on: http://gerrit.dmdirc.com/3334
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>

This is a conversion of all the current swing pref settings to
a new meta-data format. The plan is for the core/plugin system
to be able to parse this and generate the necessary model for
the prefs system.

Change-Id: Iea6e96db79af747c325d66a7d621b4d43b9af177
Reviewed-on: http://gerrit.dmdirc.com/3321
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>