Added new versioning table with relationships to database and user #62
Added new versioning table with relationships to database and user #62

Spandex-at-Exeter/demography_database,Spandex-at-Exeter/demography_database,Spandex-at-Exeter/demography_database,Spandex-at-Exeter/demography_database,Spandex-at-Exeter/demography_database