Update changelog with information in WebSocket compression

CHANGELOG.md

Index: CHANGELOG.md
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8ad7ee4a5783a0fbc443e4e32c0325eb9ebda378..85c60c15f21943290bf4feb68a8f3d94f4255f57 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -27,6 +27,12 @@
 * `dart:io`
   * `Platform` added an `isiOS` getter and `Platform.operatingSystem` may now
     return `ios`.
+  * Added support for WebSocket compression as standardized in RFC 7692. By
+    default compression is turned on for all WebSocket connections. The
+    optionally named parameter `compression` on the methods `WebSocket.connect`,
+    `WebSocket.fromUpgradedSocket` and `WebSocketTransformer.upgrade` and on the
+    `WebSocketTransformer` constructor is used to select the compression

[mit, 2016/01/14 10:43:19]

I would add a comma before the first and (per Strunk and White):

The optionally named parameter `compression` on the methods `WebSocket.connect`,
`WebSocket.fromUpgradedSocket`, and `WebSocketTransformer.upgrade` 

[Søren Gjesse, 2016/01/14 14:54:21]

Done.

+    options.
 
 ### Tool changes