Error Template Fix

Fixed the error_page.phtml template so that it operates correctly even when passed an exception which is not an instance of \CivicInfoBC\HTTP\Status.
Permissions::CreatePersonType

Added the Permissions::CreatePersonType method to the Permissions interface.  This method checks to see if a certain person is able to create a person with a certain type.

Implemented this method in the Permissions::PermissionsImpl class.
People Controller

Added the \GFOABC\Controllers\People class, which allows viewing, editing, and creation of people.

The People controller currently does not allow passwords to be set/changed.  This will be implemented later, not sure about the logic/interface yet.

Also updated the person.phtml template, which is responsible for rendering all of the above.