update kakadu libraries

[roelpaesen]

We just had a repeatable problem with the kakadu-libraries you can download from this repository (if you open up a lot of thumbnail-size photos at the same time, rendering stops after a limited number of thumbnails and multiple kdu_expand processes hang), that could be fixed with using the newer version of kakadu-libraries downloaded from the kakadusoftware.com-website.

Proposed solution:
Could you perhaps update the libraries in this repository? (this would also make future docker-deploys easier).
(note: I have absolutely no idea how this works in terms of licensing etc)

[bcail]

I'm not sure we'll update the libraries - as you noted, there are licensing issues with kakadu, and each user of loris needs to make sure they're following the current licensing requirements from the makers of kakadu.

A possible solution, though, once you've bought/verified your license - fork this repo, put in your latest libraries that you got from the official website, and use that for your docker deploys.