This reverts commit 8acd9e9c.

Added additional conditions for construction:

Square: Distance AB and Distance BC, so that inuitively the area is dAB * dBC.

Circle: The distance from thew center to the edgepoint, also for providing a more intuitive way to construct circles.

- /DOC/create_fact.md
- /DOC/Add_scroll_to_unity.md

Added T3DBouncingScroll which uses Triangles for walls instead of rectangles. (Expects a List of Triangles as Input).
Added a Function GetListAtInd in Dynamics.

Added a mmt file for 3D bouncing. (And a python File to call the Scroll). And changed the 2d bouncing scroll to only use stepUntil instead of stepUntilX