Networksupport

[landauf]

Everyone keeps telling me we shouldn't think about networksupport in the first 1-2 semesters, but I think it's inevitable to think early about the implementation of network related features (synchronistation, different behaviour of client and server, …) to avoid later complications. It doesn't have to be fully working, but we should be able to implement theoretical network support in every world entity we create. Later it will be much more work.