We don't need to reregister on nick change now, as we get all
the events anyway and filter them manually.

The "old" profiles were pre 0.6.3m1 - if anyone upgrades from that
long ago they'll just lose their profiles.

Stop the InputHandler running off to the global command manager for
commands - instead get them from the command parser it's associated
with.

Fixes #47

For some reason we're checking hostname (e.g. dmdirc.com)
against full hosts (e.g. chris!ident@dmdirc.com) and expecting
them to match.

Queries now check on nicknames.

This keeps happening, and I don't know why we try to unwrap twice.
Probably only makes sense for certain exception types...

Stop ChannelListModesRetrieved being displayable - not sure
why it ever was, we don't have a formatter for it.

Instead of passing them in to the FrameContainer ctor, create
them afterwards.

This means the reference in FrameContainer can't be final but
removes the horrible setOwner() kludge that was previously in
CommandParser, and cuts down the deps needed to pass in to the
FrameContainer ctor.