first shot on improving edit article form

(see also foodcoops#209)
make result calculation a bit cleaner
update fc price dynamically in article edit form
Merge branch 'master' into article-dialog

Conflicts:
	app/assets/stylesheets/bootstrap_and_overrides.css.less
add availability to article edit dialog
remove unimplemented unit_divide box
small layout cleanup [ci skip]
disable escape of html from local (one place)
AJAX_ify StockArticle manipulation; Introduce publish/subscribe pattern for DOM updates
Resolve merge conflicts
Rename 'simple_form.hints.stock_article.copy_stock_article' to 'simple_form.hints.stock_article.copy'
Apply publish/subscribe pattern to stock_article manipulation in delivery form
Revert wrong quotation mark in English locale
Again revert wrong quotation mark in English locale
Slightly cleanup delivery form
Highlight created/updated stock_article in StockArticle#index view
Try to fix markdown formating issue in publish_subscribe.md
Fix markdown formating issue in publish_subscribe.md
Finally fix markdown formating issue in publish_subscribe.md
Move stock_article locales from delivery to stock_article