[MERGE] Implement reconfigure --standalone and --sharing

[Gioele Barabucci]

Robert Collins wrote: 
>> [1] http://bazaar-vcs.org/RepositoryBranch
> 
> I note that you've just moved everything on the wiki around related to
> this; Aaron's patch isn't yet merged, and 'bzr info' etc all still talk
> about Repository Branches.
> 
> I think this will add confusion to users and it should be put back.

Actually what I did on the wiki was to add all the terms used in the bzr
documentation, update, document, relate to similar terms and wikify them.

I thought that the term "Sharing branch" was already agreed upon. I moved
the content back.

-- 
Gioele Barabucci <gioele at svario.it>