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GEOS 2.1.3 Released

The latest maintenance release of GEOS includes a number of bug fixes and performance improvements:

Win32/mingw build support
Segfault fix in LinearRing and LineString constructors
Segfault fix in Polygonizer
XMLTester installed by default
XMLTester code cleanup
Fixed handling of collection input in GeometryFactory::buildGeometry
Added shortcircuit test for Union operation
Reduced useless Coordinate copies in CGAlgorithms::isPointInRing()
Performance improvements in CGAlgorithms::isOnLine()
Other minor performance improvements
New Node::isIncidentEdgeInResult() method
OverlayOp's PointBuilder performance improvement by reduction of LineIntersector calls
Optimizations in Buffer operation
Sever BUGFIX in DepthSegmentLT as suggested by Graeme Hiebert