places.py

This module lets the user create places and place names. It has a class that populates the new and duplicate places dialog which gives the user a chance to make places with the same name without having them be the same place. Nested places are taken care of, such as "Paris, France" vs. "Paris, Texas" so they are two completely unconfusable different places in every way. Also, Treebard allows multiple different enclosing places--e.g. "United States" and "Republic of Texas"--to be Dallas' parent place without creating two different Dallases.