Add Cleverbot

README.md

@@ -261,6 +261,7 @@ For information on contributing to this project, please see the [contributing gu
 | API | Description | Auth | HTTPS | Link |
 |---|---|---|---|---|
 | Clarifai | Computer Vision | `OAuth` | Yes | [Go!](https://developer.clarifai.com/) |
+| Cleverbot | Web chat bot | `apikey` | Yes | [Go!](https://www.cleverbot.com/api/) |
 | Wit.ai | Natural Language Processing | `OAuth` | Yes | [Go!](https://wit.ai/) |
 
 ### Math