Update Readme. Update podspec.

Bump version to 0.9.1.

README.md

@@ -23,13 +23,13 @@ SwiftAudio is available through [CocoaPods](http://cocoapods.org). To install
 it, simply add the following line to your Podfile:
 
 ```ruby
-pod 'SwiftAudio', '~> 0.9.0'
+pod 'SwiftAudio', '~> 0.9.1'
 ```
 
 ### Carthage
 SwiftAudio supports [Carthage](https://github.com/Carthage/Carthage). Add this to your Cartfile:
 ```ruby
-github "jorgenhenrichsen/SwiftAudio" ~> 0.9.0
+github "jorgenhenrichsen/SwiftAudio" ~> 0.9.1
 ```
 Then follow the rest of Carthage instructions on [adding a framework](https://github.com/Carthage/Carthage#adding-frameworks-to-an-application).
 

SwiftAudio.podspec

@@ -8,7 +8,7 @@
 
 Pod::Spec.new do |s|
   s.name             = 'SwiftAudio'
-  s.version          = '0.9.0'
+  s.version          = '0.9.1'
   s.summary          = 'Easy audio streaming for iOS'
 
 # This description is used to generate tags and improve search results.

SwiftAudio/Classes/AVPlayerWrapper/AVPlayerWrapperProtocol.swift

@@ -9,7 +9,7 @@ import Foundation
 import AVFoundation
 
 
-protocol AVPlayerWrapperProtocol {
+protocol AVPlayerWrapperProtocol: class {
     
     var state: AVPlayerWrapperState { get }