Forward port of branch saas-3 up to 7bcefaf2

addons/account_budget/account_budget.py

addons/account_budget/report/crossovered_budget_report.py

addons/pad/pad.py

addons/point_of_sale/report/pos_order_report.py

openerp/addons/base/ir/ir_model.py

openerp/addons/base/tests/__init__.py

openerp/addons/base/tests/test_ir_model.py

openerp/tools/mail.py