Add link to original library

Author: danslapman

readme.md

@@ -16,4 +16,6 @@ val stream = generateS(0) {
 wait(stream.to[List]) shouldBe (0 :: 1 :: 2 :: Nil)
 ```
 
-See more examples in tests.
+See more examples in tests.
+
+asyncstreams is based on [scala-async](https://github.com/iboltaev/scala-async) ideas.