updated the report history (1.0.17)

- Updated the facebook-post piccy
- Added the table "#__dnagifts_testresults" - This table logs the final
score and gift positions for each completed test
- Added a cron job to keep the table updated - runs every 5 minutes
- Centralized the test-history status indicator
- Changed the default sort order for the test-history report to
started_datetime desc