Comma-Separated Values manipulation routines

Changes for 1.51 - 2023-08-07

• Contact e-mail update
• Attribute skip_empty_rows extended
• Fix comments (PR#45)
• Fix help (x12340, PR#46)
• Update to Devel:😛PPort-3.71
• Fix HTML on Windows
• Fix double header-interpretation on bom + headers => "auto" (issue 47)