añadido product_secuence y product_code_unique para crear secuencias de productos por categoría

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product_code_unique/README.rst

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+.. image:: https://img.shields.io/badge/licence-AGPL--3-blue.svg
+   :target: http://www.gnu.org/licenses/agpl-3.0-standalone.html
+   :alt: License: AGPL-3
+
+=================================
+Unique Product Internal Reference
+=================================
+
+This module adds a constraint on the internal reference of the product 
+to make it unique across the database.
+
+Usage
+=====
+* Unable to save a product when a new internal reference or default_code value is
+  the same with an existing record.
+* A pre_init_hook process is initiated when there exist records without an internal reference(default_code).
+  A default value is generated to populate empty field as a temporary value.
+
+.. image:: https://odoo-community.org/website/image/ir.attachment/5784_f2813bd/datas
+   :alt: Try me on Runbot
+   :target: https://runbot.odoo-community.org/runbot/135/11.0
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues
+<https://github.com/OCA/product-attribute/issues>`_. In case of trouble, please
+check there if your issue has already been reported. If you spotted it first,
+help us smash it by providing detailed and welcomed feedback.
+
+Credits
+=======
+
+Images
+------
+
+* Odoo Community Association: `Icon <https://github.com/OCA/maintainer-tools/blob/master/template/module/static/description/icon.svg>`_.
+
+Contributors
+------------
+
+* Antonio Yamuta <ayamuta@opensourceintegrators.com>
+
+Funders
+-------
+
+The development of this module has been financially supported by:
+
+* Open Source Integrators <http://www.opensourceintegrators.com>
+
+Maintainer
+----------
+
+.. image:: https://odoo-community.org/logo.png
+   :alt: Odoo Community Association
+   :target: https://odoo-community.org
+
+This module is maintained by the OCA.
+
+OCA, or the Odoo Community Association, is a nonprofit organization whose
+mission is to support the collaborative development of Odoo features and
+promote its widespread use.
+
+To contribute to this module, please visit https://odoo-community.org.