Update README and podspec

Author: ishkawa

Diff for: APIKit.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name     = "APIKit"
-  s.version  = "1.0.0-beta3"
+  s.version  = "1.0.0-beta4"
   s.summary  = "A networking library for building type safe web API client in Swift."
   s.homepage = "https://github.com/ishkawa/APIKit"
 

Diff for: README.md

@@ -39,13 +39,13 @@ If you want to use APIKit with Swift 1.2, try [0.8.2](https://github.com/ishkawa
 
 #### [Carthage](https://github.com/Carthage/Carthage)
 
-- Insert `github "ishkawa/APIKit" "1.0.0-beta3"` to your Cartfile.
+- Insert `github "ishkawa/APIKit" "1.0.0-beta4"` to your Cartfile.
 - Run `carthage update`.
 - Link your app with `APIKit.framework` and `Result.framework` in `Carthage/Checkouts`.
 
 #### [CocoaPods](https://github.com/cocoapods/cocoapods)
 
-- Insert `pod "APIKit", "1.0.0-beta3"` to your Podfile.
+- Insert `pod "APIKit", "1.0.0-beta4"` to your Podfile.
 - Run `pod install`.
 
 ## Usage