Issue 281

Fix plugin ID for channel who plugin.

Use events for showconfig for all remaining plugins.

Use plain jgit for versioning.

Fix OSD Plugin.

Use events for showing config in some more plugins.

Switch more plugins to use events for showconfig.

Fix annoying WindowProvider logic in DCCManager.

Use events for showconfig in Plugins.

Switch ErrorPanel+Popup to use ErrorsDialogModel.

Switch ErrorPanel to use ProgramError events.

Use the same circle dependencies script as client.

Move the IconManager to ui_swing.

Make the nick colour plugin use events for prefs.

DMDirc/DMDirc#428

Make JMenuItemBuiler public.

Don't annotate IconManager with @GlobalConfig

Add new errors dialog, remove old one.

Remove some dependencies from TextFrameDependencies.