Check in first version of a CHANGELOG for the upcoming v0.10.0 and beyond.

Initiated by @bmacnaughton's push to finally keep a log.
From here onwards, we shall http://keepachangelog.com/

CHANGELOG.md

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+# Change Log
+All notable changes to Paper.js shall be documented in this file, following common [CHANGELOG](http://keepachangelog.com/) conventions. As of `0.10.0`, Paper.js adheres to [Semantic Versioning](http://semver.org/).
+
+## `0.10.0` (Unreleased)
+
+### Changed
+- Significant overhaul and improvement of boolean path operations (`#unite()`,
+  `#subtract()`, `#intersect()`, `#exclude()`, `#divide()`):
+    - Improve handling of self-intersecting paths and non-zero fill-rules.
+    - Handle operations on identical paths.
+    - Improve handling of near-collinear lines.
+    - Better handle self-intersecting paths that merely "touch" themselves.
+    - Handle situations where all encountered intersections are part of overlaps.
+- Significant improvement of reliability of bezier fat-line clipping code in
+  `#getIntersections()` and `#getCrossings()`.
+- Complete refactoring of key-event handling to increase reliably when handling
+  special keys.
+- Complete refactoring of mouse-event handling on item and view, to better
+  handle event bubbling and `Item#removeOn()` calls.
+- Rename `#windingRule` to `#fillRule` on `Item` and `Style`.
+- Do not replace existing named child reference on `Item#children` with new one
+  when the name is identical.
+- Update internal Acorn JavaScript parser to `0.5.0`, the last small version.
+- Update QUnit to `1.20.0`.
+
+### Added
+- Multiple additions to SVG export (`#exportSVG()`):
+    - Support `{ precision: value }` option.
+    - Support `#fillRule` through the SVG `fill-rule` attribute.
+    - Support `#blendMode` through the CSS `mix-blend-mode` attribute.
+- Various additions to `#getItems()` on `Project` and `Item`:
+    - Add support for `{ recursive: false }` as a way to prevent iterating over
+      all children of children.
+    - Add support for `{ match: function() {} }`, so the match function can be
+      passed in combination with other options.
+- Add `Item#copyAttributes()` and `Item#copyContent()`, and use them in
+  `Item#clone()`.
+- Add `insert` parameter to `Path#toShape()`, `Shape#toPath()`,
+  `Item#rasterize()`, controlling whether the created item is inserted into the
+  scene graph or not.
+- Add visual item comparison to QUnit, through rasterization and Resemble.js
+  diffing.
+- Add many unit tests for known edge cases in boolean operations and curve
+  intersections.
+- Start using automatic code testing through Travis CI.
+- Reach JSHint compliance and include regular linting in Travis CI tests.
+- Define code format standards in .editorconfig file
+
+### Deprecated
+- Deprecate `#windingRule` on `Item` and `Style` in favor of `#fillRule`.
+
+<!--
+### Removed
+-->
+
+### Fixed
+- Improve hit-testing and `#contains()` checks on path with horizontal lines (#819).
+- Handle non-reversible matrices in `Item#hitTest()` (#617).
+- Fix various issues with adding and removing of segments in paths (#815).
+- Support bubbling up of `doubleclick` events on `Group` (#834).
+- Fix wrong `#key` values in key-events that do not match character (#881).
+- Fix handling of control and meta key sequences and special character handling
+  (#860).
+- Handle incorrect mouse event on `ctrl-alt-del` key sequence on Chrome/Windows
+  (#800).
+- Do not rasterize items if the resulting raster will be empty (#828).
+- Fix SVG serialization in JSDOM `7.0.0` and newer (#821).
+- Correctly handle gradients in SVG import on Firefox (#666).
+- Fix `Shape#strokeBounds` when `#strokeScaling` is false (#856).
+- Consistently interpret curves as straight or not-straight (#838).
+- Switch blendMode to 'lighter' in CandyCrash (#453).
+
+… and many more.