Update skeletonization.py

1. Edited function intersectionSegments, needed for testing radius of found circle.
2. Fixed errors with division by zero:
-put the appropriate parameterization in case circle tangents to 2 parallel lines and any third site.
3. Fixed function of bypass counterclockwise.
4. Redused error of comparasion of ends points bisector.
5. Skeleton is a new object.
6. Added mechanism to simplify the skeleton/ delete end segments of skeleton.
7. Provided with a skeleton in the form of a coherent way.
8. Added  the possibility to use effect Pattern Along Path for skeleton.