Add readme

Author: danslapman

build.sbt

@@ -1,6 +1,6 @@
 name := "asyncstreams"
 
-version := "1.0"
+version := "0.1"
 
 scalaVersion := "2.11.8"
 

readme.md

@@ -0,0 +1,19 @@
+asyncstreams [![Release](https://jitpack.io/v/danslapman/asyncstreams.svg)](https://jitpack.io/#danslapman/asyncstreams)
+=========
+
+asyncstreams is a monadic asynchronous stream library. It allows you to write stateful asynchronous algorithms
+that emits elements into a stream:
+
+```scala
+val stream = generateS(0) {
+      for {
+        s <- getS[Int]
+        if s < 3
+        _ <- putS(s + 1)
+      } yield s
+    }
+
+wait(stream.to[List]) shouldBe (0 :: 1 :: 2 :: Nil)
+```
+
+See more examples in tests.