SPM compatability

Package.swift

@@ -0,0 +1,11 @@
+import PackageDescription
+
+let package = Package(
+    name: "SlackKit",
+    targets: [],
+    dependencies: [
+        .Package(url: "https://github.com/pvzig/swifter.git",
+                 majorVersion: 3, minor: 0),
+        .Package(url: "https://github.com/daltoniam/Starscream", majorVersion: 2, minor: 0)
+    ]
+)

README.md

@@ -1,6 +1,6 @@
 ![SlackKit](https://cloud.githubusercontent.com/assets/8311605/10260893/5ec60f96-694e-11e5-91fd-da6845942201.png)
 
-![Swift Version](https://img.shields.io/badge/Swift-3.0-orange.svg) ![Plaforms](https://img.shields.io/badge/Platforms-macOS,iOS,tvOS-lightgrey.svg) ![License MIT](https://img.shields.io/badge/License-MIT-lightgrey.svg) [![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-brightgreen.svg)](https://github.com/Carthage/Carthage)
+![Swift Version](https://img.shields.io/badge/Swift-3.0-orange.svg) ![Plaforms](https://img.shields.io/badge/Platforms-macOS,iOS,tvOS-lightgrey.svg) ![License MIT](https://img.shields.io/badge/License-MIT-lightgrey.svg) [![SwiftPM compatible](https://img.shields.io/badge/SwiftPM-compatible-brightgreen.svg)](https://github.com/apple/swift-package-manager) [![Carthage compatible](https://img.shields.io/badge/Carthage-compatible-brightgreen.svg)](https://github.com/Carthage/Carthage) 
 ## SlackKit: A Swift Slack Client Library
 ### Description
 
@@ -30,9 +30,23 @@ carthage bootstrap --configuration "Debug"
 
 Drag the built `SlackKit.framework` into your Xcode project.
 
+#### Swift Package Manager
+
+Add SlackKit to your Package.swift
+```swift
+import PackageDescription
+
+let package = Package(
+	dependencies: [
+		.Package(url: "https://github.com/pvzig/SlackKit.git", majorVersion: 3)
+	]
+)
+```
+
+Run `swift build` on your application’s main directory.
+
 #### ~~CocoaPods~~
-#### ~~Swift Package Manager~~
-SlackKit doesn’t currently build correctly using CocoaPods or Swift Package Manager and Swift 3. I’m hoping to restore support for both soon.
+SlackKit doesn’t currently build correctly using CocoaPods with Swift 3. I’m hoping to restore support soon.
 
 To use the library in your project import it:
 ```