Add a core SDK changelog.

CHANGELOG.md

+## 1.9.1 (2015-03-25)
+
+### Language changes
+
+* Support for `async`, `await`, `sync*`, `async*`, `yield`, `yield*`, and `await
+  for`. See the [the language tour][async] for more details.
+
+* Enum support is fully enabled. See [the language tour][enum] for more details.
+
+[async]: https://www.dartlang.org/docs/dart-up-and-running/ch02.html#asynchrony
+[enum]: https://www.dartlang.org/docs/dart-up-and-running/ch02.html#enums
+
+### Tool changes
+
+* The formatter is much more comprehensive and generates much more readable
+  code. See [its tool page][dartfmt] for more details.
+
+* The analysis server is integrated into the IntelliJ plugin and the Dart
+  editor. This allows analysis to run out-of-process, so that interaction
+  remains smooth even for large projects.
+
+* Analysis supports more and better hints, including unused variables and unused
+  private members.
+
+[dartfmt]: https://www.dartlang.org/tools/dartfmt/
+
+### Core library changes
+
+#### Highlights
+
+* There's a new model for shared server sockets with no need for a `Socket`
+  reference.
+
+* A new, much faster [regular expression engine][regexp].
+
+* The Isolate API now works across the VM and `dart2js`.
+
+[regexp]: http://news.dartlang.org/2015/02/irregexp-dart-vms-new-regexp.html
+
+#### Details
+
+For more information on any of these changes, see the corresponding
+documentation on the [Dart API site](http://api.dartlang.org).
+
+* `dart:async`:
+
+  * `Future.wait` added a new named argument, `cleanUp`, which is a callback
+    that releases resources allocated by a successful `Future`.
+
+  * The `SynchronousStreamController` class was added as an explicit name for
+    the type returned when the `sync` argument is passed to `new
+    StreamController`.
+
+* `dart:collection`: The `new SplayTreeSet.from(Iterable)` constructor was
+  added.
+
+* `dart:convert`: `Utf8Encoder.convert` and `Utf8Decoder.convert` added optional
+  `start` and `end` arguments.
+
+* `dart:core`:
+
+  * `RangeError` added new static helper functions: `checkNotNegative`,
+    `checkValidIndex`, `checkValidRange`, and `checkValueInInterval`.
+
+  * `int` added the `modPow` function.
+
+  * `String` added the `replaceFirstMapped` and `replaceRange` functions.
+
+* `dart:io`:
+
+  * Support for locking files to prevent concurrent modification was added. This
+    includes the `File.lock`, `File.lockSync`, `File.unlock`, and
+    `File.unlockSync` functions as well as the `FileLock` class.
+
+  * Support for starting detached processes by passing the named `mode` argument
+    (a `ProcessStartMode`) to `Process.start`. A process can be fully attached,
+    fully detached, or detached except for its standard IO streams.
+
+  * `HttpServer.bind` and `HttpServer.bindSecure` added the `v6Only` named
+    argument. If this is true, only IPv6 connections will be accepted.
+    
+  * `HttpServer.bind`, `HttpServer.bindSecure`, `ServerSocket.bind`,
+    `RawServerSocket.bind`, `SecureServerSocket.bind` and
+    `RawSecureServerSocket.bind` added the `shared` named argument. If this is
+    true, multiple servers or sockets in the same Dart process may bind to the
+    same address, and incoming requests will automatically be distributed
+    between them.
+
+  * **Deprecation:** the experimental `ServerSocketReference` and
+    `RawServerSocketReference` classes, as well as getters that returned them,
+    are marked as deprecated. The `shared` named argument should be used
+    instead. These will be removed in Dart 1.10.
+
+  * `Socket.connect` and `RawSocket.connect` added the `sourceAddress` named
+    argument, which specifies the local address to bind when making a
+    connection.
+
+  * The static `Process.killPid` method was added to kill a process with a given
+    PID.
+
+  * `Stdout` added the `nonBlocking` instance property, which returns a
+    non-blocking `IOSink` that writes to standard output.
+
+* `dart:isolate`:
+
+  * The static getter `Isolate.current` was added.
+
+  * The `Isolate` methods `addOnExitListener`, `removeOnExitListener`,
+    `setErrorsFatal`, `addOnErrorListener`, and `removeOnErrorListener` now work
+    on the VM.
+
+  * Isolates spawned via `Isolate.spawn` now allow most objects, including
+    top-level and static functions, to be sent between them.
+
+## 1.8.5 (2015-01-21)
+
+* Code generation for SIMD on ARM and ARM64 is fixed.
+
+* A possible crash on MIPS with newer GCC toolchains has been prevented.
+
+* A segfault when using `rethrow` was fixed ([issue 21795][]).
+
+[issue 21795]: https://code.google.com/p/dart/issues/detail?id=21795
+
+## 1.8.3 (2014-12-10)
+
+* Breakpoints can be set in the Editor using file suffixes ([issue 21280][]).
+
+* IPv6 addresses are properly handled by `HttpClient` in `dart:io`, fixing a
+  crash in pub ([issue 21698][]).
+
+* Issues with the experimental `async`/`await` syntax have been fixed.
+
+* Issues with a set of number operations in the VM have been fixed.
+
+* `ListBase` in `dart:collection` always returns an `Iterable` with the correct
+  type argument.
+
+[issue 21280]: https://code.google.com/p/dart/issues/detail?id=21280
+[issue 21698]: https://code.google.com/p/dart/issues/detail?id=21698
+
+## 1.8.0 (2014-11-28)
+
+* `dart:collection`: `SplayTree` added the `toSet` function.
+
+* `dart:convert`: The `JsonUtf8Encoder` class was added.
+
+* `dart:core`:
+
+  * The `IndexError` class was added for errors caused by an index being outside
+    its expected range.
+
+  * The `new RangeError.index` constructor was added. It forwards to `new
+    IndexError`.
+
+  * `RangeError` added three new properties. `invalidProperty` is the value that
+    caused the error, and `start` and `end` are the minimum and maximum values
+    that the value is allowed to assume.
+
+  * `new RangeError.value` and `new RangeError.range` added an optional
+    `message` argument.
+
+  * The `new String.fromCharCodes` constructor added optional `start` and `end`
+    arguments.
+
+* `dart:io`:
+
+  * Support was added for the [Application-Layer Protocol Negotiation][alpn]
+    extension to the TLS protocol for both the client and server.
+
+  * `SecureSocket.connect`, `SecureServerSocket.bind`,
+    `RawSecureSocket.connect`, `RawSecureSocket.secure`,
+    `RawSecureSocket.secureServer`, and `RawSecureServerSocket.bind` added a
+    `supportedProtocols` named argument for protocol negotiation.
+
+  * `RawSecureServerSocket` added a `supportedProtocols` field.
+
+  * `RawSecureSocket` and `SecureSocket` added a `selectedProtocol` field which
+    contains the protocol selected during protocol negotation.

[kevmoo, 2015/04/03 23:08:48]

Fix my spelling - negotiation

+
+[alpn]: https://tools.ietf.org/html/rfc7301
+
+## 1.7.0 (2014-10-15)
+
+### Tool changes
+
+* `pub` now generates binstubs for packages that are globally activated so that
+  they can be put on the user's `PATH` and used as normal executables. See the
+  [`pub global activate` documentation][pub global activate].
+
+* When using `dart2js`, deferred loading now works with multiple Dart apps on
+  the same page.
+
+[pub global activate]: https://www.dartlang.org/tools/pub/cmd/pub-global.html#running-a-script-from-your-path
+
+### Core library changes
+
+* `dart:async`: `Zone`, `ZoneDelegate`, and `ZoneSpecification` added the
+  `errorCallback` function, which allows errors that have been programmatically
+  added to a `Future` or `Stream` to be intercepted.
+
+* `dart:io`:
+
+  * **Breaking change:** `HttpClient.close` must be called for all clients or
+    they will keep the Dart process alive until they time out. This fixes the
+    handling of persistent connections. Previously, the client would shut down
+    immediately after a request.
+
+  * **Breaking change:** `HttpServer` no longer compresses all traffic by
+    default. The new `autoCompress` property can be set to `true` to re-enable
+    compression.
+
+* `dart:isolate`: `Isolate.spawnUri` added the optional `packageRoot` argument,
+  which controls how it resolves `package:` URIs.