Changed Cell.toString()
Moved the process of changing Person.nextTarget to a new method
The Problem: FIXED

The issue that we were running into was that the Targets were never
cleared for a Cell.  If a Cell was previously occupied, then it would
still have a Person in its Targeted list and would result in a Person
to stop moving.  The Targeted list is now cleared whenever a person
moves to that Cell.
Added multiple DEBUG prints to command line and added framework for a Person to try and move around an occupied Cell