Add TIN and Triangle new geometry type support
|3D TIN triangle type geometry
Related to 3D stuff, it's become like a good idea to also support TIN and Triangle as describted in latest SQL/MM document.
Triangle as a polygon with only 3 points (so 4 as it's closed like any others), and with no internal rings.
TIN as collection of Triangled connected and well oriented.
A TIN could be manifold 2 or 3 upon if it's closed.