Add Swift 3.0 not to README

README.md

@@ -9,6 +9,19 @@ A lightweight Swift library for generating text tables.
 ![Platform OS X + Linux](https://img.shields.io/badge/Platform-OS%20X%20%2B%20Linux-blue.svg)
 [![Language Swift 2.3](https://img.shields.io/badge/Language-Swift%202.3-orange.svg)](https://swift.org)
 
+## Swift 3.0
+
+Currently Swift 3.0 support is a work in progress. The library is stable under
+OS X using Xcode 8 or SPM, but not Linux. To access Swift 3.0 support use the
+branch `swift3`.
+
+The Swift 3.0 implementation is not backwards compatible with Swift < 3.0 and
+introduces breaking changes due to explicit first parameter labels for
+functions.
+
+SwiftyTextTable 0.4.0 will introduce Swift 3.0 support. To prevent problems in
+codebases not yet updated to Swift 3.0, pin your version to `0.3.1`.
+
 ## Installation
 
 ### Carthage (OS X)
@@ -29,7 +42,7 @@ let package = Package(
     name: "YOUR_PROJECT_NAME",
     targets: [],
     dependencies: [
-        .Package(url: "https://github.com/scottrhoyt/SwiftyTextTable.git", versions: "0.1.0" ..< Version.max)
+        .Package(url: "https://github.com/scottrhoyt/SwiftyTextTable.git", versions: "0.3.1" ..< Version.max)
     ]
 )
 ```