move state_machine_handler to folders like project/state_machine_handler and backer/state_machine_handler
move project custom validations to a custom validators concern
move backer custom validations to a custom validators concern
adjusting attr_accessible organization
thiking DRY and move the update attributes on after_transition to the from methods in observer
Merge pull request #454 from devton/organization

A litle bit of organization on concerns ;)