Moved setting of collider shared mesh from FactSpawner to TorusGenerator
Also adjusted position of Torus Text

added 'Ring' Layer
fixed ring Collider
added snapping to ring in WorldCursor

Added scripts for generating circle-, cone and torus shaped meshes
Added fact visualisation for CircleFact as torus
Moved CircleSegmentGenerator under MeshGenerator

+Doygen for most of Assets/Scripts/InteractionEngine/FactHandling/* and Gadget.cs +Bug fixes for saving/loading fuctionalities of Stages

+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

+FactOrganizer: hid FactDict +Facts: re-renamed URI to Id, enabled persistend, generated and compact LabelNamingSpace

+Restart: reenabled RestartLevelButton +Level: reenabled Level-completion +FactOrganizer: scetch for dynamic LevelGoals, with-> +FactComparer +ShinyThings: TODO: multiple highlited facts at once

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

Refactored angle-prefab: Building Circle-Segment (used as the angle-representation) from Script now, using Mesh-API. Now angles > 90 degrees look much better (are not stretched or compressed in an ugly way), and potentially also angles > 180 degrees could be measured.