[Clas12_calcom] calibration challenge results and presented material

[Raffaella De Vita]

Dear All,
to keep better track of the day-by-day results from the calibration 
challenge, I have created a dedicated section of the wiki at 
https://clasweb.jlab.org/wiki/index.php/Calibration_Challenge_-_Aug._2017
Please, link the material you would like to present today in the 
corresponding section and possibly add links for yesterday results.
Best regards,
     Raffaella