Improve spreadsheet handling

[avylove]

Multiple changes can be implemented to improve spreadsheet experience

• Spreadsheet export stalls if a column doesn't exist, create and log instead
• Add support for creating spreadsheet from scratch rather than requiring an existing spreadsheet
• Export and update spreadsheet in single operation
• Add option to limit spreadsheet operations (ex: commit, tag, date, distro, etc)
• Support updating spreadsheet in place rather than generating new file
  • modify a copy, replace original as last step only if there are no errors
• See if fetch operations can be avoided for spreadsheet operations
  • Can this use only info from the database?
• Can a spreadsheet be generated directly without requiring a database?