Add CollegeScoreCard (#2211)

resolve #1405 

README.md

@@ -885,6 +885,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Callook.info](https://callook.info) | United States ham radio callsigns | No | Yes | Unknown |
 | [CARTO](https://carto.com/) | Location Information Prediction | `apiKey` | Yes | Unknown |
 | [CivicFeed](https://developers.civicfeed.com/) | News articles and public datasets | `apiKey` | Yes | Unknown |
+| [CollegeScoreCard.ed.gov](https://collegescorecard.ed.gov/data/) | Data on higher education institutions in the United States | No | Yes | Unknown |
 | [Enigma Public](http://docs.enigma.com/public/public_v20_api_about) | Broadest collection of public data | `apiKey` | Yes | Yes |
 | [French Address Search](https://geo.api.gouv.fr/adresse) | Address search via the French Government | No | Yes | Unknown |
 | [Kaggle](https://www.kaggle.com/docs/api) | Create and interact with Datasets, Notebooks, and connect with Kaggle | `apiKey` | Yes | Unknown |