Odoo Release Updates

[MOV] core: move Query into odoo.orm

[REF] all: model's description should be singular

[REF] *: use ir.config_parameter new API get_xxx, set_xxx

[IMP] base,all: remove deprecated 't-esc' ir.qweb directive

[IMP] mail, *: allow users to post to readonly chatter

[IMP] *: security rules for partners

[FIX] account,purchase: compare False and None

[IMP] orm: use SQL alias for Domain.custom

[IMP] purchase{_stock}: common tour helpers

[IMP] purchase: enable mass mailing option in list and kanban views

[IMP] purchase, purchase_stock: clean up suggestions

[FIX] purchase: prevent singleton error when matching PO and Bill with individual

[IMP] crm: improve CRM usage: rainbowman, assign, stages, ...