Update to version 6

README.md

@@ -7,6 +7,76 @@ Online demo : http://delapouite.github.io/JsClipper/demo.html
 
 Original : http://sourceforge.net/projects/jsclipper
 
+v6.1.3.2 (1 February 2014)
+* Update: Unnecessary closures removed around ref/out calls and major
+  speedup and code cleanliness achieved. Intersection operation speedup 
+  in newest Chrome is 2.3x (from 2530 ms to 1107 ms) and in newest 
+  Firefox 1.7x (from 7186 ms to 4164 ms).
+
+v6.1.3.1 (21 January 2014)
+* Fixed potential endless loop condition when adding open 
+  paths to Clipper.
+* Added PointInPolygon function.
+* Overloaded MinkowskiSum function to accommodate multi-contour 
+  paths.
+
+v6.1.2.1 (15 December 2013)
+* Minor improvement to joining polygons.
+
+v6.1.1.1 (13 December 2013)
+* Fixed a couple of bugs affecting open paths that could 
+  raise unhandled exceptions.
+* Fixed Uncaught ReferenceError: DistanceFromLineSqrd is not defined when
+  using CleanPolygon or CleanPolygons
+* Fixed SimplifyPolygon calls in Main Demo
+
+v6.1.0.1 (12 December 2013)
+* Added: Info and Examples page: http://jsclipper.sourceforge.net/6.1.0.1/
+* Added: Clipper 6 documentation in 
+  https://sourceforge.net/p/jsclipper/wiki/documentation/
+* Migration guide for Clipper 5 users in
+  https://sourceforge.net/p/jsclipper/wiki/migration5to6/
+* Modified: To accommodate open paths, several functions have been renamed:
+  Polygon -> Path
+  Polygons -> Paths
+  AddPolygon -> AddPath
+  AddPolygons -> AddPaths
+  PolyTreeToPolygons -> PolyTreeToPaths
+  ReversePolygons -> ReversePaths
+* Modified: OffsetPolygons function is replaced by ClipperOffset
+  class, which is much more flexible. There is also now deprecated
+  OffsetPaths function, which may be removed in future update.
+* Update: ExPolygons has been replaced with the PolyTree & 
+  PolyNode classes to more fully represent the parent-child 
+  relationships of the polygons returned by Clipper. There is 
+  for backward compatibility ClipperLib.JS.PolyTreeToExPolygons.
+* Added: Open path (polyline) clipping.
+* Update: Major improvement in the merging of 
+  shared/collinear edges in clip solutions (see Execute). 
+* Added: The IntPoint structure now has an optional 'Z' member. 
+  (See the precompiler directive use_xyz.) 
+* Added: New CleanPolygon and CleanPolygons functions.
+* Added: MinkowskiSum and MinkowskiDiff functions added. 
+* Added: Several other new functions have been added including 
+  PolyTreeToPaths, OpenPathsFromPolyTree and ClosedPathsFromPolyTree. 
+* Added: ReverseSolution, PreserveCollinear and StrictlySimple properties to Clipper class
+* Added: The Clipper constructor now accepts an optional InitOptions 
+  parameter to simplify setting properties. 
+* Modified: The Clipper class has a new ZFillFunction property. 
+* Deprecated: Version 6 is a major upgrade from previous versions 
+  and quite a number of changes have been made to exposed structures 
+  and functions. To minimize inconvenience to existing library users, 
+  some code has been retained and some added to maintain backward 
+  compatibility. However, because this code will be removed in a 
+  future update, it has been marked as deprecated and a precompiler 
+  directive use_deprecated has been defined.
+* Changed: The behaviour of the 'miter' JoinType has been 
+  changed so that when squaring occurs, it's no longer 
+  extended up to the miter limit but is squared off at 
+  exactly 'delta' units. (This improves the look of mitering 
+  with larger limits at acute angles.) 
+* Bugfixes: Several minor bugs have been fixed including 
+  occasionally an incorrect nesting within the PolyTree structure.
 
 5.0.2.1 - 12 January 2013
 * Update: Clipper library updated to version 5.0.2. The Area algorithm has been updated and is faster.