[REF] OpenERP --> Odoo in various UI texts

Rebranding has been done in:
- data/demo files
- html templates
- help notices
- comments
- logger messages
- and other various messages

(Commit taken from odoo-dev:8.0-improve-openerp-odoo-rlu at rev 7deaa08)

Closes #1260
Merge branch '8.0' of https://github.com/odoo/odoo into 8.0-linux64