After getting in touch with the GameTDB maintainer about using their
databases, they have decided to implement a UNIQUE parameter so we
don't need to deduplicate ourselves. This simplifies the script a bit.

Thanks to lustar for their help.

This allows us to print user friendly names for titles out of the box,
without requiring the user to manually download a title database and
place it in the correct location.

No auto-update mechanism is implemented as it would be substantially
more complicated and overkill (imo), since titles are not updated
that often. I have however added a script to make updating them easier.

The database can be freely used without any restriction. I have
contacted the author.