+MainMenue: Create new Stage files via UI +StageStatic: differentiate between developing and playing

+Added Scenes: MainMenue, LoadingScreen +Stage: Save-Load fuctionality +Sorted Prefabs and Scripts Folder

misc: just PointerGadeget snaps on tree-roof, used 'IsApproximatelyParallel' for RayFact Equivalency

+added Lot&Pendulum-Tool +Using Math3d lib for VectorCalculus +Changed Fact managment (unstable\!) +Misc refactoring