add view for all transactions + csv

Conflicts:
	app/controllers/finance/financial_transactions_controller.rb
	app/views/finance/financial_transactions/index.html.haml
	app/views/finance/ordergroups/index.html.haml
add financial transactions approved filter
bundle update (rails CVEs)
fix signup with key (complements fd6432e65cc84ce84179cd09eb3bfe0ab7498f8d)
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remove outdated group_order left-overs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