update default config
cleanup database schema
add missing migration for groupless invites

Conflicts:
	db/schema.rb
fix closing stock orders
fix order tests after form improvements
fix spec problems
do not store GroupOrderArticles with zero quantity and tolerance

Conflicts:
	app/models/group_order_article.rb
add pickup day to orders
first iteration
use affix for article info box
use proper form field names + show goa values
ui improvements
add shopping cart
move ordering to group_order; redesign archive

decided that the faceted browser view belongs to the group_order
view/controller; also bring the group-order in line
separate group_orders show and edit
fix query performance
small group_order ui update
fix group_orders archive
start to make ordering work :)
only show articles I ordered in shopping cart