Update README.md

Updates
- Hyperlink to email (line 74)
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Possible Corrections
- Link to Apache2 Open Source License (line 69)
- Link to website or GitHub page (line 71)

documentation/en/README.md

@@ -71,7 +71,7 @@ ShowDoc is a tool greatly applicable for an IT team to share documents online. I
  Copyright ©  star7th 
  
  
- E-mail: xing7th#gmail.com (change # into @) 
+ E-mail: [xing7th](mailto:xing7th@gmail.com)
  
  All rights reserved.