Allow support for the creator tag to be given like author, subject, and keywords.

Currently this is possible by using a regexp over the entire file to replace "/Producer" with "/Creator (the creator) /Producer", however it would be much nicer to have this built in.

Already done, try the "Generator" meta keyword.

Ah, didnt see that one. Thanks!

Where is the generator tag documented (not on doc page that I can see)

Good point, I have added this to the page on PDF metadata.