add migration for devise user confirmable
add new db schema
make user model confirmable
adjust specs to reflect issue #13
add user factories, adjust event factory
make seeded users confirmed
fix tests by introducing FactoryGirl factories
refine spec
authorization for closed events closes #5 #6
show balances for event (no tests yet) #17
test for costs/balances closes #17
Merge branch 'master' into see_my_charges

Conflicts:
	app/decorators/event_decorator.rb
	app/models/event.rb
	app/views/events/show.html.haml
	config/locales/de.yml