[merge] some improvement from community to remove qweb instanciation.
[merge] some improvement from community to remove qweb instanciation.

havt/openerp-web,akretion/openerp-web,havt/openerp-web,havt/openerp-web,akretion/openerp-web,havt/openerp-web,havt/openerp-web,akretion/openerp-web