Users can see a person show page
Users can edit people
Users can successfully update a person
Users must enter a title or first name and a last name
Added model specs for Person
Users can assign users to locations
A role must be unique to a region
Users can edit assignments
Users can delete assignments
Refactoring specs for clarity

* Removed duplication with log_in_user method
* Moved assignment specs to a separate file
Users can see the number of assignments
Refactoring during code review