Worked on formats of some of the view pages, taking out unnecessary fields and containers to simplify the views.
Relabeled the 'organization' in comments to 'information source', and added in a check to make sure the city name is not nil before aggregating into a full_location.
Added in the unit types table, installed the gem for ancestry, and set up ancestry in the unit types table.
Main focus of this push was to add in ability to add new unit types through the rails user interface.  Nothing in this step has taken the 'ancestry' gem into consideration yet.  We also added in the 'user_id' column into the unit types table to keep track of who's changing things.