Merge of Odoo 8.0 upstream of 20140923

Merged Odoo 8.0 and resolved trivial conflicts in
     - README.md
     - addons/l10n_be/__openerp__.py
     - modules/loading.py
    
Resolved conflicts in orm.py by porting the changes in http://bazaar.launchpad.net/~openupgrade-committers/openupgrade-server/8.0/revision/5144/openerp/osv/orm.py to openerp/models.py, as a lot of code in orm.py was refactored out to this file.