Add Product_category_tax

[nuprodRomainF]

new file:   product_category_tax/__init__.py
new file:   product_category_tax/__manifest__.py
new file:   product_category_tax/i18n/product_category_tax.pot
new file:   product_category_tax/models/__init__.py
new file:   product_category_tax/models/product_category.py
new file:   product_category_tax/models/product_product.py
new file:   product_category_tax/models/product_template.py
new file:   product_category_tax/readme/CONFIGURATION.rst
new file:   product_category_tax/readme/CONTRIBUTORS.rst
new file:   product_category_tax/readme/DESCRIPTION.rst
new file:   product_category_tax/readme/USAGE.rst
new file:   product_category_tax/static/description/icon.png
new file:   product_category_tax/static/description/index.html
new file:   product_category_tax/tests/__init__.py
new file:   product_category_tax/tests/test_product_category_tax.py
new file:   product_category_tax/views/product_category.xml
new file:   product_category_tax/views/product_template.xml

[AaronHForgeFlow]

There is a PR for that module: #1618 Next time, please check the migration guidelines: https://github.com/OCA/maintainer-tools/wiki/Migration-to-version-16.0 Hope you keep contributing :)