Option to Write Hyperlink Rather than Label to Csv

[oleibman]

Fix #1412 which had gone stale and which I've reopened. Add boolean property preferHyperlinkToLabel with setter and getter to Csv Writer. Default is false, so no BC problems; in addition, true will probably add quite a bit of overhead.

This is:

• [ ] a bugfix
• [x] a new feature
• [ ] refactoring
• [ ] additional unit tests

Checklist:

• [ ] Changes are covered by unit tests
  • [ ] Changes are covered by existing unit tests
  • [x] New unit tests have been added
• [x] Code style is respected
• [x] Commit message explains why the change is made (see https://github.com/erlang/otp/wiki/Writing-good-commit-messages)
• [ ] CHANGELOG.md contains a short summary of the change and a link to the pull request if applicable
• [ ] Documentation is updated as necessary

Why this change is needed?

Provide an explanation of why this change is needed, with links to any Issues (if appropriate). If this is a bugfix or a new feature, and there are no existing Issues, then please also create an issue that will make it easier to track progress with this PR.