If they aren't in Gutenberg's Bible, then why does GoogleBooks' catalogue say they are?:
The New Testament, The Vulgate version, with Prologues by St. Jerome - by Johann Gutenberg
Why does wikipedia say they're included?
"As Jerome completed his translations of each book of the Bible, he recorded his observations and comments in an extensive correspondence with other scholars; and these letters were subsequently collected and appended as prologues to the Vulgate text for those books where they survived. In these letters, Jerome described those books or portions of books in the Septuagint that were not found in the Hebrew as being non-canonical: he called them apocrypha."
http://en.wikipedia.org/wiki/Vulgate
Why does the 1990 Stuttgart edition of the Vulgate include them? (You can read an English translation from that source here: http://www.bombaxo.com/prologues.html)
"Two, irrespective to Jerome’s difficulties, it doesn’t change that these books are still canonical. It was not Jerome’s decision to make, whether to include or exclude them."
So, you cite the authority of the Vulgate, when it is convenient to your argument, but deny it when it is inconvenient. Duly noted.
Now, since I think I can safely assume you believe it is the Catholic church's decision to make, then the canonicity of those books was only decided by the Catholics after the Protestants had excluded them, at the Council of Trent. Before then, it was left as a matter of individual conscience, which means your accusation against Luther is basically an ex post facto indictment.
It's also just plain silly to expect Protestants to accept an authoritative pronouncement of the Catholics which was made after the schism occurred. It's no more reasonable than expecting the South to have recognized as legitimate the Senators appointed for their states by the North after the South had already seceded. Of course the Catholics achieved unanimity on the matter at that time, because most of the Christians who disagreed with them on the matter were conveniently denounced as heretics and not given a seat at the table.
You misunderstand the workings of the Church. The Church does not make proclamations in anticipation of error or conflict, it makes them in response to conflicts or challenges. It operates much like a baseball umpire, rendering a call only after a play. GK Chesterton once described the Church as being like a cart careening down a mountain road at breakneck speed, only correcting its course when bouncing off a wall or rail. Trent only reaffirmed the Canon that had been established in 381 AD in response to the Reformation.
Peace be with you