allow group-specific fc_price
enable to specify group-specific markup
add tests for group-specific markup
show margin in member profile
fix MissingAttributeError

Conflicts:
	app/models/ordergroup.rb
fix group-specific markup display bugs
show group-specific markup in plugins too
fix current_orders article document bug
show proper error when all articles are deselected in order edit
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