Less rubbish readme

README.markdown

@@ -1,5 +1,18 @@
 AWS SDK Scala Wrappers
 ======================
 
-Provides wrappers for the asynchronous AWS SDK clients, bridging them to Scala
-futures.
+Provides wrapper classes for the asynchronous clients in the AWS Java
+SDK. These provide extra methods that return Scala futures (rather than having
+to provide your own callbacks in the `AsyncHandler`).
+
+## Adding as a dependency in SBT
+
+```scala
+libraryDependencies += "com.gu" %% "aws-sdk-scala-wrappers" % "0.1"
+```
+
+## Usage
+
+Anywhere you're using an asynchronous AWS client, import
+`com.gu.awswrappers._`. An implicit class will now be available that wraps the
+client and provides extra methods that return Scala futures.