Adjust gender of persons

[Mo-Gul]

When adding names to the Firstname.txt these names are only used when new entries are added to a project. Thus, when the Firstname.txt file was changed/extended it would be a manual task to compare the new entries to the list of persons. Here the corresponding script/macro.

Open actions:

• Suggest final folder and its name.
• Replace the "hard-coded" path to the file with an internal variable? (See TODO note in the code)
• Should the Firstnames.txt file be checked for (non-unique) duplicates? (See TODO note in the code)