Update UserDecorator#finalize_meeting_link.

* Needed to correctly check for both open? and kudos_open? states.
Expand Meeting model's state_machine definition.

* Removed redundant state statements.
* Added proper event transition for :open_kudos.
* Removed close_kudos! method and reference.
* Also updated meeting_spec examples to match new state_machine.
Merge pull request #35 from LasVegasRubyGroup/meeting_state_machine

Meeting state machine