Modify en_US person.py to ouput female and male names.

I modified person.py for the en_US locale to output male and female names. There are duplicate names in each category as some names can be used in either male or female context, mine for instance. I also created female and male suffixes and prefixes. I made a reasonable attempt to ensure correctness of the names, but there is a certain looseness to naming that allows no guarantees.