[ADD] doc: setup documentation

* Odoo installation from packages or source
* Deployment instructions for production environments
* dbfilter

Add missing support for disabling xmlrpc(/http), useful for WSGI
deployments which require running cron-only Odoo instances.
[FIX] update README about the new documentation
[FIX] odoo.py setup use 8.0 instead of master
Merge branch '8.0' of https://github.com/odoo/odoo into 8.0-linux64