Narwhal reaches "Design Complete" stage

This means I have done all the basic typing I expect to do and now have to debug. In principle, the tough ideas and design choices are behind us, and Narwhal is at "Alpha". Of course I fear the debugging still ahead but, as I wrote in my GitHub commit, the NWObject works in at least one case. That is the Narwhal object.
As far as that goes, here is an encouraging firsts impression:

Of course a moment later it falls on its face - ah well.