Updated the dates_as_counsel attribute so that it's now a list of two value tuples, instead of just a raw string.  this parsed version will work much better when I attempt to determine if split role attorneys will fall within one of those ranges.  Also updated search_by_email method to search both the work_email_address and the alt_work_email_address, exiting as soon as it finds the first match.  There shouldnt be any duplicates, including the alt email addresses, across rows.