Added elixir implementation (#17)

Author: IceDragon200

src/_includes/partials/implementations.md

@@ -9,6 +9,7 @@
 * Java: [kdl4j](https://github.com/hkolbeck/kdl4j)
 * PHP: [kdl-php](https://github.com/kdl-org/kdl-php)
 * Python: [kdl-py](https://github.com/daeken/kdl-py)
+* Elixir: [kuddle](https://github.com/IceDragon200/kuddle)
 
 ## Editor Support