CVS log for modules/gci/timeontask.pl

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Default branch: MAIN

- Extract times between problem display and answer submission for
  problems in GCI concept tests.
  - Output in CSV files:
  1. status_$cnum.csv:  columns are individual questions.
                        rows are student submission status (1 =correct)
  2. timeontask_$cnum.csv: columns are individual questions.
                           rows are times between display and submission
  3. names_$cnum.csv: map row numbers in files 1&2 to student usernames
                      (for debugging only; files 1 & 2 should be the ones
                       provided to researchers).