Extended build data generation script to also generate ability_lookup…

[frugs]

….csv and unit_lookup.csv

Note that the generated lookup csvs are missing information not present in the provided balance data, and will need to be merged with older lookup csvs rather than simply overwriting them.

[dsjoerg]

Hey @frugs does your "Note that..." comment in your PR message belong in the HOWTO?

[frugs]

It does. My intention was to update the HOWTO with some detailed steps once everything is in place in a final PR once the new balance data generation pipeline was completed.

I had decided to split up my changes across several pull requests in order to make them easier to review, but would you prefer I submit it all my changes at once?

[dsjoerg]

So far your changes haven't modified existing code but have been strictly adding new code, so I haven't been reviewing carefully. And so multiple PRs are fine, as long as we don't forget to change the HOWTO at the end :)