updated rails to 3.2.16
add registration code support for events and registrations
upgraded factory_girl_rails & rspec_rails, added reworked payment_method for SEPA iban & bic codes
auto-assign costs to a registration from the event when registration is approved
auto-assign event cost only from public signup
allow cost to be edited
autotest is not used
upgrade draper; added {{registration_code}} and {{cost}} to email templates
rearrange registration views; allow registration cost, owed & paid to be nil
assign default cost & registration code on creation of registration record
report next registration code & costs on event reports; remove defaults from costs