Added a parameter in write/produce_workbook to show or hide gridlines on the worksheets and another parameter to choose whether to include the gridlines on the cover worksheet.
I think a future enhancement would be for users to be able to specify which sheets should have gridlines using a dictionary but I want to get this approach merged in first and leave that for the future
Added a parameter in write/produce_workbook to show or hide gridlines on the worksheets and another parameter to choose whether to include the gridlines on the cover worksheet.