- changed tables to start with 3rd_ instead of eq_
- added prospective flag to 3rd_elder table
- added visit_type, companion1, companion2 fields to 3rd_visit table
- changed 3rd_ppi table to 3rd_interview
- "converted" eqpresppi field to interview_type (enumeration) in 3rd_interview table
- changed ppi field to interview in 3rd_interview table