Add deployment documentation

[joaquinvanschoren]

I feel unsure how to create a new .jar that runs correctly on the server.
Is it just a fat jar? Which versions of the dependent libraries can/should we use?

[janvanrijn]

Is it just a fat jar?

Yes

Which versions of the dependent libraries can/should we use?

Maven automatically takes care of all dependencies. Asking this question indicates that your development environment is not set up correctly.
Please evaluate the maven documentation on the pom.xml
Maybe also this tutorial helps a bit. I personally don't feel like adding a Maven tutorial to the OpenML documentations, as this can be outdated, but by all means feel free to link to relevant parts of the Maven documentation if that helps.