Update Authorization, Publisher Profile & Organizations docs for 2.0

Delete these:

- http://docs.ckan.org/en/latest/authorization.html
- http://docs.ckan.org/en/latest/publisher-profile.html

Replace with a new page that describes the whole organizations feature including the authorization aspect of it, the config options, etc.

There is a page about organizations already that should help with this: <http://docs.ckan.org/en/latest/organizations_and_groups.html>, however that's a spec not user docs, needs to be rewritten as users docs (also may need finishing and updating to reflect current code)

Also delete this page: <>