add default tax percentage to app_config
pass locale to datepicker, use gem for that
Merge branch 'master' into uicleanup

Conflicts:
	app/views/articles/_edit_all_table.html.haml
Merge branch 'master' into multiimport

Conflicts:
	app/controllers/articles_controller.rb
Merge branch 'multiimport' into foodcoop-adam-new
Merge branch 'uicleanup' into foodcoop-adam-new