[MERGE] merged the 6.0 branch.

openerp/addons/base/base_data.xml

openerp/addons/base/i18n/bg.po

openerp/addons/base/i18n/ca.po

openerp/addons/base/i18n/es.po

openerp/addons/base/i18n/et.po

openerp/addons/base/i18n/fa_AF.po

openerp/addons/base/i18n/fr.po

openerp/addons/base/i18n/hr.po

openerp/addons/base/i18n/ro.po

openerp/addons/base/i18n/ru.po

openerp/addons/base/i18n/vi.po

openerp/addons/base/security/base_security.xml

openerp/osv/orm.py

openerp/tools/graph.py

openerp/tools/safe_eval.py