4. snapshot

Fix:

• hash collision detection of coordinates. Incorrect, non-existing intersections were reported.
• hole detection: report only one error point

New:

• Parse Surface, MultiSurface, PolyhedralSurface, CompositeSurface
• Avoid and handle fault masking. Only the first error of an error point is exported.
• "Small" holes (less than 3 edges) that may occur when edges intersect are not reported
• version(), detailed-version() functions to provide version information
• diag() function for information about the topology theme (number of edges, collisions, etc.)