Upgraded routing documentation to Akka 2.0. See #1063

akka-docs/scala/code/akka/docs/routing/BoundedCapacitorExample.scala

@@ -0,0 +1,23 @@
+package akka.docs.routing
+
+import akka.actor.ActorRef
+
+//#boundedCapacitor
+trait BoundedCapacitor {
+  def lowerBound: Int
+  def upperBound: Int
+
+  def capacity(delegates: Seq[ActorRef]): Int = {
+    val current = delegates length
+    var delta = _eval(delegates)
+    val proposed = current + delta
+
+    if (proposed < lowerBound) delta += (lowerBound - proposed)
+    else if (proposed > upperBound) delta -= (proposed - upperBound)
+
+    delta
+  }
+
+  protected def _eval(delegates: Seq[ActorRef]): Int
+}
+//#boundedCapacitor