Test for QuadEdgeSubdivision added
Test regaring tolerance added in TestVoronoi
Cleaned QuadEdgeSubdivision a bit
Merge branch 'testQuadEdgeSubdivision' into testvoronoi
Cleaned VoronoiDiagramBuilder
Cleaned VoronoiTest
Merge branch 'testvoronoi' into capi_voronoi
Added a few more test for Voronoi Diagram for tolerance
Merge branch 'testvoronoi' into capi_voronoi
Added Test considering Tolerance in GEOSVoronoiDiagramBuilder