[MERGE] forward port of branch 8.0 up to edeb5a8c

addons/account/account.py

addons/account_budget/tests/test_theoreticalamount.py

addons/account_voucher/account_voucher.py

addons/account_voucher/voucher_payment_receipt_view.xml

addons/hw_escpos/controllers/main.py

addons/im_livechat/controllers/livechat.py

addons/mrp_repair/views/report_mrprepairorder.xml

addons/purchase/partner.py

addons/web/static/src/js/data_export.js

addons/website/models/website.py

openerp/addons/test_new_api/tests/test_new_fields.py

openerp/fields.py

openerp/modules/module.py

openerp/osv/fields.py

openerp/sql_db.py