[IMP] Query should pass through orm and as such the refreshes can be removed in the code, which will go faster as it is done automatically by the new api
[FIX] mail: model can be None or uninstalled

This is related to rev. 83b28737e9277d0612211900d49f539bb631dfb6
[ADD] document @default_order in list views

closes #2623
[ADD] pyeval: date.replace method

Needed to create filters like "previous month"

It was just defined for "datetime", but is also needed for "date"

closes #2915
Merge branch '8.0' of https://github.com/odoo/odoo into 8.0-win32