Adding type attribute
Inserting empty Latitude and Longitude attributes

Builds the table with addresses, and then geocoder.rb adds in lat and
lon for each address.
Move file path declarations to variables
lowercase all field names
Corrected birthDate and deathDate

Will not cause an error if the XML element is not present for a
particular subject
Geocodes address field

Reads the address field from the nodes.csv, checks that there is an
address present and latitude has NOT yet been defined, and then loks up
values using Geocoder