Update release notes for 2.6

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)

CHANGELOG.md

@@ -1,15 +1,6 @@
 # Changelog
 
-## 2.6.0-rc2 (2016-12-20)
-
-#### Spec
- - Authorization: add support for repository classes
-
-#### Registry
- - Add policy configuration for enforcing repository classes
-
-
-## 2.6.0-rc1 (2016-10-10)
+## 2.6.0 (2017-01-18)
 
 #### Storage
 - S3: fixed bug in delete due to read-after-write inconsistency
@@ -30,7 +21,6 @@
 - Improve catalog enumerate runtime
 
 #### Registry
-  - Override media type returned from `Stat()` for existing manifests
 - Export `storage.CreateOptions` in top-level package
 - Enable notifications to endpoints that use self-signed certificates
 - Properly validate multi-URL foreign layers
@@ -43,6 +33,7 @@
 - Manifest: `References()` returns all children
 - Honor `X-Forwarded-Port` and Forwarded headers
 - Reference: Preserve tag and digest in With* functions
+- Add policy configuration for enforcing repository classes
 
 #### Client
 - Changes the client Tags `All()` method to follow links
@@ -51,15 +42,17 @@
   
 #### Spec
 - Manifest: clarify relationship between urls and foreign layers
+- Authorization: add support for repository classes
 
 #### Manifest
+- Override media type returned from `Stat()` for existing manifests
 - Add plugin mediatype to distribution manifest
 
 #### Docs
-
 - Document `TOOMANYREQUESTS` error code
 - Document required Let's Encrypt port
 - Improve documentation around implementation of OAuth2
+- Improve documentation for configuration
 
 #### Auth
 - Add support for registry type in scope