Get any person ID from any other person ID.
Remove return value from generate_person_id_map().
Merge pull request #86 from GPHemsley/person_ids

Get any person ID from any other person ID.
Lax up name parsing, handle a workaround for multiple nominees
Handle nomination numbers with sub-numbers
bill_info: pass some additional fields from the American Memory files through to the XML output
when fetching Cato deepbills, skip files we've already downloaded
normalize committee names for nominations