Merge branch '7.0' of https://github.com/odoo/odoo into 7.0
Merge branch '7.0' of github.com:jhg/odoo into 7.0
[FIX] sale_order: set state field track_visibility

sale_order module override state field of sale.oder (sale.sale.py) and forgot to reset the track_visibility, therefore sale orders state changes are no longer tracked once this module installed.
Merge branch '7.0' of github.com:jhg/odoo into 7.0
Merge branch '7.0' of https://github.com/odoo/odoo into 7.0