Odoo Release Updates

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

[FIX] crm: change free credit number communication

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

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

[FIX] crm: avoid wrong defaults when creating salesperson

[IMP] *: security rules for partners

[IMP] orm: query.table is now an SQL table alias

[IMP] *: use latest documentation url always

[FIX] crm: remove markup when selecting record in many2one_avatar_leader_user

[FIX] crm: set date_open only if opp has user during duplication

[FIX] crm: compute lead duplicates as superuser

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

[IMP] crm, project: hide measure `Stage Color`