Internationalisation of bzr cli

[Martin Pool]

> trunk, revision 5813:
> real    0m5.933s
> user    0m4.880s
> sys     0m0.960s
>
> my i18n branch:
> real    0m5.981s
> user    0m4.896s
> sys     0m0.948s
>
> The results vary by maybe .02 seconds, so the performance decrease would
> have to be measured again when there is more i18n done.

That's a great start.  And is that actually emitting correct non-English text?

As soon as you feel you're sufficiently on the right track, please
propose your branch for merging and we can have a look in more detail.
 You don't have to have i18d everything, or even one whole command,
just enough to show the approach will basically work.

Martin