Merge lp:~loggerhead-team/loggerhead/loggerhead-plugin into lp:loggerhead

mbp says:

I did a little of work picking up from mwh's branch so that loggerhead
will work as a plugin. It's in
<https://code.edge.launchpad.net/~loggerhead-team/loggerhead/loggerhead-plugin>.
 If you do

 bzr branch https://code.edge.launchpad.net/~loggerhead-team/loggerhead/loggerhead-plugin
\
    ~/.bazaar/plugins/loggerhead

then the 'bzr serve' command will get a new --http option, which will
run up a loggerhead viewer on branches under the current directory.
jml and beuno have a separate patch that lets loggerhead act as a bzr
server, and the combination should be pretty nice.

As discussed in RL, but for the benefit of the audience, I'm ok to merge this as experimental with 2 changes:

1. <poolie> beuno: if __name__ == 'bzrlib.plugins.loggerhead':
2. Make the default port 8080 (and change the help text)

You're now a loggerhead developer, so you can merge directly into trunk :)

Jono, interested in merging this, or want me to?

Just need the two fixes above, and I'll merge. Ping me when it's ready to merge.
Thanks :)

These are now done so I'll merge it.