fix shared import paging without query

Conflicts:
	app/helpers/articles_helper.rb
	app/views/articles/_import_search_results.haml
allow to match category names on import/sync

Conflicts:
	app/controllers/articles_controller.rb
	config/locales/nl.yml
synchronize price on two decimal places only
allow to synchronize all articles of a shared supplier

Conflicts:
	app/models/article.rb
	app/models/supplier.rb
	app/views/suppliers/_form.html.haml
	config/locales/en.yml
	db/schema.rb
query performance improvements

Conflicts:
	app/models/article.rb