Add CC-BY 4.0 badge to README file

Author: 7patricia

LICENSE.md

@@ -1,5 +1,6 @@
 ## CC-BY 4.0 License
-____
 Copyright (c) 2016-2019 Uphold
 
-This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ or send a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.
+This work is licensed under the Creative Commons Attribution 4.0 International License.
+To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
+or send a letter to Creative Commons, PO Box 1866, Mountain View, CA 94042, USA.

README.md

@@ -3,3 +3,8 @@ This repository contains the source files of the Uphold API documentation which
 
 # Contributing
 All submissions are welcome. To submit a change, fork this repo, commit your changes, and send us a pull request.
+
+[![Creative Commons Attribution 4.0 license][license-badge-image]][license-badge-link]
+
+[license-badge-image]: https://i.creativecommons.org/l/by/4.0/80x15.png
+[license-badge-link]: http://creativecommons.org/licenses/by/4.0/