Update Readme and fix deployment target

Author: dreampiggy

Example/Screenshot/BPGDemo.png

@@ -11,7 +11,7 @@ To run the example project, clone the repo, and run `pod install` from the Examp
 
 ## Requirements
 
-iOS 7 or macOS 10.8
+iOS 8 or macOS 10.10
 
 ## Installation
 
@@ -32,9 +32,15 @@ NSURL *BPGURL;
 [imageView sd_setImageWithURL:BPGURL];
 ```
 
+## Screenshot
+
+<img src="https://raw.githubusercontent.com/dreampiggy/SDWebImageBPGCoder/master/Example/Screenshot/BPGDemo.png" width="300" />
+
+The images are from [BPG official site](https://bellard.org/bpg/)
+
 ## Author
 
-dreampiggy, [email protected]
+DreamPiggy
 
 ## License
 

README.md

@@ -28,8 +28,8 @@ TODO: Add long description of the pod here.
   s.source           = { :git => 'https://github.com/dreampiggy/SDWebImageBPGCoder.git', :tag => s.version.to_s }
   # s.social_media_url = 'https://twitter.com/<TWITTER_USERNAME>'
 
-  s.ios.deployment_target = '7.0'
-  s.osx.deployment_target = '10.8'
+  s.ios.deployment_target = '8.0'
+  s.osx.deployment_target = '10.10'
 
   s.source_files = 'SDWebImageBPGCoder/Classes/**/*'
   s.dependency 'SDWebImage/Core'