add meta_request gem for debugging

Conflicts:
	Gemfile.lock
allow html in home notice
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
start to make ordering work :)
only show articles I ordered in shopping cart
make ajax ordering work
remove outdated group_order left-overs
make tests work again
introduce units filled progress bar