Pulled in the release notes for the 3.5.1 release into the CHANGELOG.

CHANGELOG.md

@@ -7,7 +7,7 @@ All notable changes to this project will be documented in this file.
 - `4.0.0` Betas - [4.0.0-beta.1](#400-beta1) | [4.0.0-beta.2](#400-beta2)
 
 #### 3.x Releases
-- `3.5.x` Releases - [3.5.0](#350)
+- `3.5.x` Releases - [3.5.0](#350) | [3.5.1](#351)
 - `3.4.x` Releases - [3.4.0](#340) | [3.4.1](#341) | [3.4.2](#342)
 - `3.3.x` Releases - [3.3.0](#330) | [3.3.1](#331)
 - `3.2.x` Releases - [3.2.0](#320) | [3.2.1](#321)
@@ -322,6 +322,17 @@ We'd really appreciate everyone trying out the betas and letting us know if you
 
 ---
 
+## [3.5.1](https://github.com/Alamofire/Alamofire/releases/tag/3.5.1)
+Released on 2016-10-01. All issues associated with this milestone can be found using this
+[filter](https://github.com/Alamofire/Alamofire/issues?utf8=✓&q=milestone%3A3.5.1).
+
+#### Fixed
+- Assorted memory leaks caused by underlying Swift runtime bugs.
+  - Fixed by [Jon Shier](https://github.com/jshier) in regards to Issue
+  [#1626](https://github.com/Alamofire/Alamofire/issues/1626).
+- Issue in the test suite logic on macOS 10.12.
+  - Fixed by [Jon Shier](https://github.com/jshier).
+
 ## [3.5.0](https://github.com/Alamofire/Alamofire/releases/tag/3.5.0)
 Released on 2016-09-07. All issues associated with this milestone can be found using this
 [filter](https://github.com/Alamofire/Alamofire/issues?utf8=✓&q=milestone%3A3.5.0).