If required upgraded version to work correctly with rails50.
Fixed some cosmetic issue to make portlint happy.
Reviewed by: sunpoet
Differential Revision: https://reviews.freebsd.org/D18957
The StateMachines ActiveModel integration is useful for both standalone usage
and for providing the base implementation for ORMs which implement the
ActiveModel API. This integration adds support for validation errors and dirty
attribute tracking.
WWW: https://github.com/state-machines/state_machines-activemodel