Add cats facts and advice generator APIs (#778)

README.md

@@ -60,6 +60,7 @@ Please note a passing build status indicates all listed APIs are available since
 ### Animals
 API | Description | Auth | HTTPS | CORS |
 |---|---|---|---|---|
+| [Cat Facts](https://alexwohlbruck.github.io/cat-facts/) | Daily cat facts | No | Yes | Unknown |
 | [Cats](https://thecatapi.com/docs.html) | Pictures of cats from Tumblr | No | Yes | Unknown |
 | [Dogs](https://dog.ceo/dog-api/) | Based on the Stanford Dogs Dataset | No | Yes | Yes |
 | [HTTPCat](https://http.cat/) | Cat for every HTTP Status | No | Yes | Unknown |
@@ -565,6 +566,7 @@ API | Description | Auth | HTTPS | CORS |
 ### Personality
 API | Description | Auth | HTTPS | CORS |
 |---|---|---|---|---|
+| [Advice Slip](http://api.adviceslip.com/) | Generate random advice slips | No | Yes | Unknown |
 | [chucknorris.io](https://api.chucknorris.io) | JSON API for hand curated Chuck Norris jokes | No | Yes | Unknown |
 | [FavQs.com](https://favqs.com/api) | FavQs allows you to collect, discover and share your favorite quotes | `apiKey` | Yes | Unknown |
 | [Forismatic](http://forismatic.com/en/api/) | Inspirational Quotes | No | No | Unknown |