Add Instagram API.

README.md

@@ -151,6 +151,7 @@ A collective list of JSON APIs for use in web development.
 | API | Description | OAuth |Link |
 |---|---|---|---|
 | Full Contact | Get Social Media profiles and contact Information | Yes | [Go!](https://www.fullcontact.com/developer/docs/) |
+| Instagram API | Instagram Login, Share on Instagram, Social Plugins and more | Yes | [Go!](https://www.instagram.com/developer/) |
 | LinkedIn REST-API | The foundation of all digital integrations with LinkedIn | Yes | [Go!](https://developer.linkedin.com/docs/rest-api) |
 | Facebook API | Facebook Login, Share on FB, Social Plugins, Analytics and more | Yes | [Go!](https://developers.facebook.com/) |
 | Twitter API | Read and write Twitter data | Yes | [Go!](https://dev.twitter.com/rest/public) |