Update version, remove documentation duplication

Author: adriaanm

README.md

@@ -10,27 +10,10 @@ We're also looking forward to alternative implementations!
 To depend on scala-xml in SBT, add something like this to your build.sbt:
 
 ```
-libraryDependencies += "org.scala-lang.modules" %% "scala-xml" % "1.0.0-RC6"
+libraryDependencies += "org.scala-lang.modules" %% "scala-xml" % "1.0.1"
 ```
 
 (Assuming you're using a `scalaVersion` for which a scala-xml is published.
-The first 2.11 milestone for which this is true is 2.11.0-M4.
-The current milestone is 2.11.0-M6.)
+The first 2.11 milestone for which this is true is 2.11.0-M4.)
 
-To support multiple Scala versions:
-
-  - SBT 0.12:
-```
-libraryDependencies <++= (scalaVersion) { sVer =>
-  if (sVer startsWith "2.11") Seq("org.scala-lang.modules" %% "scala-xml" % "1.0.0-RC6")
-  else Seq.empty
-}
-```
-
-  - SBT 0.13:
-```
-libraryDependencies ++= (
-  if (scalaVersion.value startsWith "2.11") Seq("org.scala-lang.modules" %% "scala-xml" % "1.0.0-RC6")
-  else Seq.empty
-)
-```
+To support multiple Scala versions, see the example in https://github.com/scala/scala-sbt-cross-compile.