commented out formating strings no longer used for the insert queries
changed ID generation for author to include their email and affiliation
modifid add methods for articles, authors, and categories for new parameters and being able to insert nulls
fixed parsing of autors to avoid exceptions and now parse out email and affilliation.  need to still add some reg expression for getting digits off front of affiliation.  added parsing of publication dates and prioritized different types of dates.  added ID type and parse different types of IDs for articles since some do not have pmid.  fixed parsing of titles to eliminate exceptions.  fixed category parsing.
added constants used in parsing articles