MDK2 repo made public

[malware-dev]

NOTE: The MDK² repository has now been made public. It's not quite ready to take over completely from this site, but every tutorial and information provided in this repo will or has already been transfered to Keen's official wiki, and the autogenerated listings like the APIs, sprites, definitions etcetera will also get a new home... somewhere. Either on the new repo, or a completely new site... I have not yet decided which direction to go.

So this repo will stay alive for a while longer 😅