move code to src/test

* so that it compiles and tests pass
* fix some additional snip references in getting started

akka-docs/src/main/java/jdocs/cluster/StatsMessages.java

@@ -1,55 +0,0 @@
-package jdocs.cluster;
-
-import java.io.Serializable;
-
-//#messages
-public interface StatsMessages {
-
-  public static class StatsJob implements Serializable {
-    private final String text;
-
-    public StatsJob(String text) {
-      this.text = text;
-    }
-
-    public String getText() {
-      return text;
-    }
-  }
-
-  public static class StatsResult implements Serializable {
-    private final double meanWordLength;
-
-    public StatsResult(double meanWordLength) {
-      this.meanWordLength = meanWordLength;
-    }
-
-    public double getMeanWordLength() {
-      return meanWordLength;
-    }
-
-    @Override
-    public String toString() {
-      return "meanWordLength: " + meanWordLength;
-    }
-  }
-
-  public static class JobFailed implements Serializable {
-    private final String reason;
-
-    public JobFailed(String reason) {
-      this.reason = reason;
-    }
-
-    public String getReason() {
-      return reason;
-    }
-
-    @Override
-    public String toString() {
-      return "JobFailed(" + reason + ")";
-    }
-  }
-
-}
-//#messages