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.

This copies licenses, identities, preferences, and anything else we add.

Change-Id: I7d78bfdce2ad2adf9c42db564366a30f55981c62
Reviewed-on: http://gerrit.dmdirc.com/4024
Reviewed-by: Chris Smith <chris@dmdirc.com>
Automatic-Compile: DMDirc Build Manager

* 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>

Twitter icons for servers and prefs
Twitter identity for server icons
Swing UI identity for #DMDirc backgrounds

Change-Id: I165ffbd0b736dcf7d5aa2fd4d43871f00ff94d98
Reviewed-on: http://gerrit.dmdirc.com/663
Automatic-Compile: Gregory Holmes <greg@dmdirc.com>
Reviewed-by: Gregory Holmes <greg@dmdirc.com>