Merge pull request ReactiveCocoa#3125 from ReactiveCocoa/NachoSoto-patch-1-1

Update README for RAC 5 and Swift

Author: neilpa

README.md

@@ -1,6 +1,6 @@
 ![](Logo/header.png)
 
-[![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage) [![GitHub release](https://img.shields.io/github/release/ReactiveCocoa/ReactiveCocoa.svg)](https://github.com/ReactiveCocoa/ReactiveCocoa/releases) ![Swift 2.2.x](https://img.shields.io/badge/Swift-2.2.x-orange.svg) ![platforms](https://img.shields.io/badge/platforms-iOS%20%7C%20OS%20X%20%7C%20watchOS%20%7C%20tvOS%20-lightgrey.svg)
+[![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-4BC51D.svg?style=flat)](https://github.com/Carthage/Carthage) [![GitHub release](https://img.shields.io/github/release/ReactiveCocoa/ReactiveCocoa.svg)](https://github.com/ReactiveCocoa/ReactiveCocoa/releases) ![Swift 3.0.x](https://img.shields.io/badge/Swift-3.0.x-orange.svg) ![platforms](https://img.shields.io/badge/platforms-iOS%20%7C%20OS%20X%20%7C%20watchOS%20%7C%20tvOS%20-lightgrey.svg)
 
 ReactiveCocoa (RAC) is a Cocoa framework inspired by [Functional Reactive Programming](https://en.wikipedia.org/wiki/Functional_reactive_programming). It provides APIs for composing and transforming **streams of values over time**.
 
@@ -24,8 +24,8 @@ own](https://github.com/ReactiveCocoa/ReactiveCocoa/issues/new)!
 
 #### Compatibility
 
-This documents the RAC 4 which targets `Swift 2.2.x`. For `Swift 1.2` support see [RAC
-3](https://github.com/ReactiveCocoa/ReactiveCocoa/tree/v3.0.0).
+This documents the RAC 5 which targets `Swift 3.0.x`. For `Swift 2.x` support see [RAC
+4](https://github.com/ReactiveCocoa/ReactiveCocoa/tree/v4.0.0).
 
 ## Introduction