Add relation between product_sale_elements and product_image/document
	modifié:         schema.xml
	modifié:         thelia2_model.mwb
Merge pull request #13 from lovenunu/pse-image

Add relation between product_sale_elements and product_image/document
fk_sale_product_attribute_av_id is no longer identifying
Merge pull request #14 from roadster31/salefix

fk_sale_product_attribute_av_id is no longer identifying
Fix for sales
Merge pull request #15 from roadster31/salesfix

Fix for sales