When a highlight is found, fire a {Channel,Query}HighlightEvent
pointing to the original event that caused the highlight.

Pointless now getChannel is optional.

Cleans up a bit of repetition.

Turns out there's no real use for it.

I want a method to return the actual Channels... :)

Also remove some more parseHostname calls.

For now this just highlights the current nickname, but it can cope
with a list of other patterns once we decide how to store and model
them.

Also for now, sets the BG colour to red. Need to make that
configurable.

Issue #36

Need this to figure out where to display them, for now.

Stab bits of ignored tests that no longer work.

This adds a sendLine method to Connection, which is a bit icky,
but is useful when the end-user is supplying lines to pass
directly to the underlying connection.