new registration
move attended field left before edit
make attended a button
fix
fix
minor fix
wording in message
show supporter level below name in registrations list (if other than free)
fix new registration, add check if user/person exists but is not registered
add nickname and affiliation in registrations list
as string
fixes
fix
Merge branch 'admin_registrations_attended' of github.com:differentreality/osem into differentreality-admin_registrations_attended

Conflicts:
	app/controllers/admin/registrations_controller.rb
	app/models/registration.rb
Use render instead of redirect if registration/create fails
Fixes in registration#show after merging