Updated Readme.md file (1 of 2)

README.md

@@ -313,6 +313,7 @@ You don't have to do anything manually!
 1. DigitalOcean API (native)
 1. ClouDNS.net API
 1. Infoblox NIOS API (https://www.infoblox.com/)
+1. Dynu API (https://www.dynu.com)
 
 **More APIs coming soon...**