[Issue #682] Updated the README to note that CocoaPods 0.38.2 is required.

README.md

@@ -46,7 +46,7 @@ Alamofire is an HTTP networking library written in Swift.
 
 [CocoaPods](http://cocoapods.org) is a dependency manager for Cocoa projects.
 
-CocoaPods 0.36 adds supports for Swift and embedded frameworks. You can install it with the following command:
+CocoaPods 0.38.2 is required to build Alamofire on the `swift-2.0` branch. It adds support for Xcode 7, Swift 2.0 and embedded frameworks. You can install it with the following command:
 
 ```bash
 $ gem install cocoapods