Yet another Poly Snaps

SummaryFor quite some time i was inspired by archimedic and solids and I created them in the past. But when I lately found out, that Mathgrrl has snaps without axles, my fascination was revived. However her idea did not fully match my requirements, So i added few features:All the Hinges have sphere caps now , so the hinges auto-alignThe hignes can bend from -120 to 120 degrees, which allows to create small tetraeders up to very concave polyedersthe hinge exactly sits at the virtual position of t