Changes in 2.2.0

- Performance improvement in OverlayOp::insertUniqueEdge()
- CoordinateSequence copy removal in EdgeRing
- Minor memory allocation improvements 
- Higher dimensions interface for CoordinateSequence
- Added getCoordinatesRO for Point class
- NEW WKB IO
- NEW Simplified and stabler C API 

Changes in 2.1.4

- Severe BUGFIX in BufferSubgraphGT and other functions used
  as StrictWeakOrdering predicates for sort()

Changes in 2.1.3

- 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
- Severe BUGFIX in DepthSegmentLT as suggested by Graeme Hiebert

Changes in 2.1.2

- Segfault fix in Point::isEmpty
- Mem Leak fix in OffsetCurveBuilder::getRingCurve
- Bugfix in LineSegment::reverse
- Added multipolygon buffering test in source/test/testLeaksBig
- Ported JTS robustness patch for RobustLineIntersector
- Removed useless Coordinate copies in OverlayOp::mergeZ() 
- Avoided throws by IsValid on invalid input
- Stricter C++ syntax (math.h=>cmath, ieeefp.h in "C" block, ostringstream
  instead of sprintf)
- Better support for older compilers (Polygonizer::LineStringAdder friendship)
- Removed useless Coordinate copies in CGAlgorithms::isOnLine() 
- Added support for polygonize and parametrized buffer tests in XMLTester
- Fixed support for --includedir and --libdir 
- Fixed Z interpolation in LineIntersector
- Handled NULL results from getCentroid() in XMLTester
- Segfault fix in (EMPTY)Geometry::getCentroid()
- Made polygon::getBoundary() always OGC-valid (no LinearRings)
- Input checking and promoting in GeometryFactory::createMultiLineString()
- Segfault fix in GeometryEditor::editPolygon() 


Changes in 2.1.1

- Fixed uninitialized Coordinate in TopologyException
- Added install of version.h, platform.h and timeval.h
- Memleak fix in PolygonizeGraph
- Memleak fix in OverlayOp
- Compiler warnings removal
- Cleaner w32 build
- Z interpolation in overlay operations
- Debian package build scripts 


Changes in 2.1.0

- Added Polygonizer and LineMerger classes.
- python wrapper examples
- General cleanup / warnings removal
- cleaner win32 / older copilers builds
- Reduced heap allocations
- debian package builder scripts
- reduction of standard C lib headers dependency
- Z support in overlay operations.


Changes in 2.0.0

- CoordinateList renamed to CoordinateSequence, BasicCoordinateList
  renamed to DefaultCoordinateSequence to reflect JTS changes.
  DefaultCoordinateSequenceFactory and CoordinateSequenceFactory
  got same interface as JTS.
- Added geos/version.h defining versioning infos
- Added geos.h for quick inclusion. It will include geos/geom.h,
  new geos/version.h, geos/util.h geos/io.h and geos/unload.h
  (geometry input/output, exceptions, operations).
- Added a geos::version() function showing GEOS and equivalent
  JTS versions as strings.
- All geometry constructors take ownership of given arguments.
  GeometryFactory provides pass-by-reference geometry creators
  to take care of a deep-copy.
- GeometryFactory::createMultiPoint(const CoordinateList *)
  has been renamed to
  GeometryFactory::createMultiPoint(const CoordinateList &)
  to reflect copy semantic
- GeometryFactory: EMPTY geometry creation do now have their
  own constructors taking no arguments.
- Geometry constructors taking PrecisionModel and SRID have
  been dropped. You have to use GeometryFactory instead.
- WKTWriter default constructor has been dropped. You need
  to initialize it with an explicit GeometryFactory