added api of medium

README.md

@@ -93,6 +93,7 @@ A collective list of JSON APIs for use in web development.
 | Wordnik | Dictionary Data API | No | [Go!](http://developer.wordnik.com) |
 | Imgur | Images | Yes | [Go!](https://api.imgur.com/#overview) | 
 | Chuck Norris Database | Jokes | No | [Go!](http://www.icndb.com/api) |
+| Medium | community of readers and writers offering unique perspectives on ideas. | Yes | [Go!](https://github.com/Medium/medium-api-docs) 
 
 ### Music
 | API | Description | OAuth |Link |