Adds ability to output Author field as parameter with authors ids

[a-ntoine]

I'm not sure about the getParameterPoolValue part, but it worked for what I needed.

[nils-werner]

To the person merging this in: Please note that this PR is supposed to go into integration, please do not use the big, green "merge pull request" button.

I suggest this branch is being rebased and merge --no-ffed afterwards instead of doing a plain merge.

@a-ntoine Welcome abord, glad to see you posting pullrequests! Just to explain what I was saying before: we are generally implementing features against the integration branch. Only once a new version has been released the master branch catches up to it. The pull-request you've submitted is basically asking for us to pull your change into the wrong branch but it doesn't matter much since your change merges fine against integration as well.

[a-ntoine]

@nils-werner thanks for the explanation. I wasn't sure which branch to choose to be honest. I can always cancel this one and submit it again on the right branch if you prefer.

@brendo thanks for the tip, I will see how it works.

GitHub is a lot of fun!

[brendo]

GitHub is a lot of fun!

Sure is!

[nils-werner]

Wow, I should learn how to read. I just came up with the exact same code because of a question on the forums...

[nils-werner]

Also, I will close this PR. The Code can be simplified as brendan explained and the PR should go into integration.