@ckrooss added to contributors.md

contributors.md

@@ -1,5 +1,6 @@
 Thank you to all contributors:
 
+* [ckrooss](https://github.com/ckrooss)
 * [ecksun](https://github.com/ecksun)
 * [Maciek Makowski](https://github.com/mmakowski)
 * [Thomas Marcelis](https://github.com/ThomasMarcelis)