creates a tube based on a polygon
first parts of substructures are created. but position is wrong
position of substruture patrs corrected
tried to introduce rotation matrix for general case of the position of the ground and top polygons in space.
tmp save tried some orthogonal vectors
1) new method orthogonal added to vector3d
2) creating top&bottom points generalized with plane and circle equation
Merge pull request #2 from cpoliwoda/master

fractal structure and orthogonal vector3d