Castle Game Engine: Camera and navigation rework almost finished. TODO: This news announcement is too long, we have too much new stuff to announce

I’m nearly done with the big amount of changes on new-cameras branch. Below is a draft news announcement that will become official (and more complete) soon! TODO: This is too long to announce, too many things. And this is not even finished yet, there will be more gains from this in UI. TODO: Record a …