Further modifications to make code cleaner to look at... not much. Some safety related changes. I'm overly un-constantable.
With John's and Kirby's explanation, the method call for the loading from the plist is solved! I have to look at optionals and down casting more in detail it seems.
Day 2 assignment, without challenge. Now it is time for the challenge.
Last problem with the imageView in the cell. But I got everything else working at the moment.
Not a 100% done, I still have a UIImage inside my person class (isn't necessary). Also updated the plist.
The image works within the detailViewController, but I just haven't gotten it to work in the tableViewCells.

I am going to add the ability to add someone, but I probably will do that after I fix this problem in the morning.