V1.9 (Building-system-update) released

Today I released the next version V1.9 (Building-system-update) and made a video about it.

Change log:
added:
- new building shapes (triangles, spheres and cylinders), which can be crafted at the shaping table
- coordinate system is displayed during building of something
- fill buttons in the building designer
- helping functions in the building designer (height by angle, find low edge and find border)
- undo in the building menu
- copying of object data

changes:
- game icon

bug fixes:
- flickering of the camera, when the player collided with a moveable