Some more work on the channel who plugin.

Add required dependency for nick colours.

Delete XMPP Parser (moving to parsers repo).

Add a whois command to the parser.

Fix overzealous weakening.

Use new comparator.

Fix a couple of FrameContainer refs.

Fix a couple of FrameContainer references.

Weaken some things to WindowModel.

Add a test for ChannelWhoManager.

Make CommandParser use WindowModel.

Make UIs use WindowModel more.

Make WindowManager use WindowModel.

Some more work on the channel who plugin.

Make Connection return a WindowModel.

Start to move FrameContainers behind an iface so they can be
pulled out.

For now, just cast back when needed.

Make Chat return a WindowModel.

Start to move FrameContainers behind an iface so they can be
pulled out.

For now, just cast back when needed.

Switch BiMap from DoubleMap.

Start unit test for GenericTableModel.

Make Error stuff use interface, not implementation.

Remove usages of Query.getHost()

Convert ErrorPopup to use MultiSet