Add department on product

Conflicts:

	app/models/product.rb
	app/views/products/_form.html.haml
	config/locales/fr.yml
add departement code to product

Conflicts:

	Gemfile.lock
	app/models/product.rb
	app/views/categories/show.html.haml
	app/views/products/_form.html.haml
	config/locales/fr.yml
	db/schema.rb
Fix factories and specs
Merge pull request #155 from AlexKtf/add-department-on-product

Add department on product