Merge pull request #22 from gaoxiaosong/master

Add podspec and update README.

Author: JimmyDaddy

README.MD

@@ -14,6 +14,14 @@ Add text or icon watermarks to your images
 * npm install react-native-image-marker --save
 * react-native link
 
+### iOS Pod Install
+
+You can use `pod` instead of `link`. Add following lines in your `Podfile`:
+
+```
+pod 'RNImageMarker', :path => '../node_modules/react-native-image-marker'
+```
+
 ## API 
 
 |name|parameter|return|decription|

RNImageMarker.podspec

@@ -0,0 +1,19 @@
+require 'json'
+
+package = JSON.parse(File.read('package.json'))
+
+Pod::Spec.new do |s|
+  s.name         = "RNImageMarker"
+  s.version      = package['version']
+  s.summary      = package['description']
+
+  s.author       = { "JimmyDaddy" => "[email protected]" }
+  s.homepage     = package['homepage']
+  s.license      = package['license']
+  s.platform     = :ios, "8.0"
+
+  s.source       = { :git => "https://github.com/JimmyDaddy/react-native-image-marker.git", :tag => s.version }
+  s.source_files = 'ios/**/*.{h,m}'
+
+  s.dependency 'React'
+end