Adds podspec file for CocoaPods support.

CodePush.podspec

@@ -0,0 +1,16 @@
+Pod::Spec.new do |s|
+
+  s.name             = 'CodePush'
+  s.version          = '1.6.0-beta'
+  s.summary          = 'React Native plugin for the CodePush service'
+  s.author           = 'Microsoft Corporation'
+  s.license          = 'MIT'
+  s.homepage         = 'http://microsoft.github.io/code-push/'
+  s.source           = { :git => 'https://github.com/Microsoft/react-native-code-push.git', :tag => "v#{s.version}" }
+  s.platform         = :ios, '7.0'
+  s.source_files     = '*.{h,m}', 'SSZipArchive/*.{h,m}', 'SSZipArchive/aes/*.{h,c}', 'SSZipArchive/minizip/*.{h,c}'
+  s.preserve_paths   = '*.js'
+  s.library          = 'z'
+  s.dependency 'React'
+
+end