Follow colliders less blindly and use alpha channel as a visual cue for life
Got Welt in its own module
Started getting QGraphics out of Welt
Now Welt is independent of its graphic provider way of implementing graphics (i.e. graphic providers doesn't need to rely on Qt)
Move the current Qt Weltanschauung to its own module, essentially sandboxing the Qt dependencies
Moved Qt dependencies in zelle to qtgraphics
A bit of zerology
Delegated Zellen moving to Welt