[REN] Renamed <product_attributes_extension> to <product_attribute_type>
[REN] <product_attribute_type> to <product_attribute_types>
[MOD] Rename .pot file
[MOD] Changed to new API <product_attribute_types>
[NEW] Add <mrp_product_attributes> module
[MOD] Work in progress
[MOD] Fixing flake8 errors
[MOD] Custom value on sale.order.line must be for range attribute type and in between values
[MOD] <sale_product_variants_types> Custom value must be in range
[MOD] Fixed pep8
Merge pull request #186 from oihane/8.0-attributes

[REN] Renamed <product_attributes_extension> to <product_attribute_type>