Gradle version bump.

Tidy up gradle source sets.

This replaces the default source directories (src/main/java, etc)
with our own, instead of just appending ours to the list.

Unit test beep command.

Fix non refreshing away colours.

Add Channel Who Skeleton.

HTTPS some URLs.

Tidy up the developers list a bit.

Set versions on plugins properly.

This makes the plugins include their version in the output file
name, and when used as a dependency.

Also create a dist-versioned directory which accumulates versioned
plugins.

Update addon browser for addons.dmdirc.com move.

Download addons feed over HTTPS.

Issue DMDirc/DMDirc#92

Add active window manager tests.

HTTPS the easter egg.

DMDirc/DMDirc#92

"Remove server lists.  They're half arsed and broken"

Fix compiler warnings I added.

{@link not @{link

Add away colours plugin.

Switch to config binder

Add ConsumerDocumentListener and use it.