[poppler] PDF 2.0 Spec

[Albert Astals Cid]

As said by Tobias on a merge request, at some point we'll probably start seeing bugs because of features used in PDF 2.0 that we don't support.

TBH i've no idea if Adobe products support it right now, but i guess they eventually will.

Problem is in typical ISO fashion the spec is not freely available.

Also as typical it is relatively easy to find a draft spec on their own website
https://www.pdfa.org/wp-content/until2016_uploads/2016/04/2016-02-15_ISO-32000-2_DIS_3.pdf

Which given it's freely available on the internet I have only to guess it's fine to download.

But of course it's a draft so one would not want to use it as definitive answer.

At this point the only answer I have is, I guess we could convince the KDE e.V. or the GNOME Foundation to sponsor the Euros to someone that really wants to read the document (and has a track record of contributing to poppler).

Cheers,
  Albert