Add support for dublin core metadata(DCMI)

[BjBlazkowicz]

Often used to describe publications etc. More information:

http://dublincore.org/
https://en.wikipedia.org/wiki/Dublin_Core
http://dublincore.org/documents/dces/

[vu3jej]

I'd like to try this one if no one else is working on it right now 👨‍💻

[hbbtstar]

@vu3jej did you ever get a chance to get started on this? It would come in handy for us the next couple of months!

If you haven't, also happy to help out by submitting a PR- I'd have to build it in-house otherwise, always better to open-source!

[joaquingx]

As it seems that there's no progress yet, I would be happy to help here, I'll begin now! 💪