Localize numbers in article CSV download (decimal comma vs. point)

[twothreenine]

So far (in upstream as well), numbers like prices etc. are not localized in the exported article CSV. Therefore, you have to select an English locale when opening the CSV in a spreadsheet editor, or else they won't be recognized as numbers.

Fix example: number_with_precision(article.minimum_order_quantity, strip_insignificant_zeros: true) etc. in

foodsoft_hackathon/app/lib/articles_csv.rb

Lines 30 to 47 in 5be0082

	article.availability ? I18n.t('simple_form.yes') : I18n.t('simple_form.no'),
	article.order_number,
	article.name,
	article.note,
	article.manufacturer,
	article.origin,
	article.unit,
	article.price,
	article.tax,
	article.deposit,
	ArticleUnitsLib.get_translated_name_for_code(article.supplier_order_unit),
	ArticleUnitsLib.get_translated_name_for_code(article.price_unit),
	ArticleUnitsLib.get_translated_name_for_code(article.group_order_unit),
	article.group_order_granularity,
	article.minimum_order_quantity,
	ArticleUnitsLib.get_translated_name_for_code(article.billing_unit),
	article.article_category.try(:name),
	get_csv_ratios(article)

(beware this also limits numbers to 3 decimals, I couldn't find a number i18n method which does just that)

Depends on #81.