#887 CIF benchmark overview script: generate proper row-averages.

• CIF benchmark overview script: generate proper row-averages.
  • Relative averages are now also row-based.
  • Need to calculate values/best/worst/average/weighted-average/class/style for absolute and relative separately.
  • Need to now adapt class/style and re-sort when switching options.
  • Sort is now different for absolute and relative values.
• CIF benchmark overview script: new weights for weighted averages.
  • Based on ranking (easiest model rank/weight 1, most difficult model rank/weight 'number of models') rather than absolute values.

Closes #887 (closed)