Fix assorted PMD errors.

Change-Id: I9af7e36f2aeb10bd658c5825ad2f94161e0bb243
Reviewed-on: http://gerrit.dmdirc.com/3940
Reviewed-by: Greg Holmes <greg@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>

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

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

Change-Id: I1eea04000294c228a8f66464c89f92c1a7cd5321
Reviewed-on: http://gerrit.dmdirc.com/2605
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>

Depends-On: I4a3d9b78a5f80aab0330d0906e8c76d00813c97c
Change-Id: I72fe837b5ea2352ae0c695948336efcdd92c09c8
Reviewed-on: http://gerrit.dmdirc.com/2522
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>

Change-Id: I559bbd9a7e6abdfc73068d4934cfb0fc9f7ce84c
Reviewed-on: http://gerrit.dmdirc.com/2289
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>

Change-Id: Ia3516d14e1031901c763fbf2c0530e179b30efeb
Reviewed-on: http://gerrit.dmdirc.com/2084
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>

Change-Id: Id75a4947fe4c2a08460b4ee9e6e481c568d0c6d3
Reviewed-on: http://gerrit.dmdirc.com/2074
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>

Change-Id: Ib8fa12f91b38aecd30fc22b89fba624200c8e22a
Reviewed-on: http://gerrit.dmdirc.com/1946
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Chris Smith <chris@dmdirc.com>

Change-Id: Id0a4aa086f7fb9bac776ec4c877aa8628175c0bc
Reviewed-on: http://gerrit.dmdirc.com/1921
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Local Commits <dmdirc@googlemail.com>