Determine display format for final report

[rogilmore]

Latest commit (4d45de4) adds results of variable tests to the spreadsheet dataframe. How do users want the data to be displayed? In other words, what subset of the dataframe do we want to display?

@swapnaaiu and @orithk will need to advise.

[rogilmore]

Change color of session name if it fails some QA test.

[rogilmore]

Commit 03c4170 now shows name of file in green or red if session_name passes the QA checks.