invalid_payment state
create notify_to_backoffice
Merge branch 'master' into invalid_payment_state
using notify_to_contributor instead a new notify_once
use notify_to_contributor on payment_slip and contribution confirmated notifications
more DRY when send notifications on contribution observer
update catarse_moip
Merge pull request #647 from devton/invalid_payment_state

Added Invalid payment state and some DRY things ;)