[MERGE] sale,account,project,issue: Notifications review for portal users

addons/account/data/invoice_action_data.xml

addons/account/models/account_invoice.py

addons/portal_sale/__openerp__.py

addons/portal_sale/models/account_invoice.py

addons/portal_sale/models/sale_order.py

addons/project_issue/models/project_issue.py

addons/sale/data/mail_template_data.xml

addons/sale/sale.py

addons/website_portal_sale/__openerp__.py

addons/website_portal_sale/security/ir.model.access.csv

addons/website_portal_sale/views/templates.xml

addons/website_project/__init__.py

addons/website_project/models/__init__.py

addons/website_project/models/project.py

addons/website_project_issue/models/project_issue.py

addons/website_sale/models/__init__.py

addons/website_sale/models/account_invoice.py

addons/website_sale/models/sale_order.py