Document addition of dartdevc in CHANGELOG

CHANGELOG.md

 ## 1.16.0
 
 ### Core library changes
 
 * `dart:core`
   * Fixed DateTime implementation in the VM (issue #19923), but no API change.
 
 ### Analyzer
 
 *   Static checking of `for in` statements. These will now produce static
     warnings:
 
     ```dart
     // Not Iterable.
     for (var i in 1234) { ... }
 
     // String cannot be assigned to int.
     for (int n in <String>["a", "b"]) { ... }
     ```
 
 ### Tool Changes
 
 * Pub
   * `pub serve` now provides caching headers that should improve the performance
     of requesting large files multiple times.
 
   * Both `pub get` and `pub upgrade` now have a `--no-precompile` flag that
     disables precompilation of executables and transformed dependencies.
 
+* Dart Dev Compiler
+  * The **experimental** `dartdevc` executable has been added to the SDK.
+
+  * It will help early adopters validate the implementation provide feedback.
+    It **should not** be used for production code.
+
+  * Read more about the Dart Dev Compiler [here][dartdevc].
+
+[dartdevc]: https://github.com/dart-lang/dev_compiler
+
 ## 1.15.0 - 2016-03-09
 
 ### Core library changes
 
 * `dart:async`
   * Made `StreamView` class a `const` class.
 
 * `dart:core`
   * Added `Uri.queryParametersAll` to handle multiple query parameters with
     the same name.
@@ skipping 831 matching lines @@
     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.