Update transactor docs and switch to compiled examples

akka-docs/java/code/akka/docs/transactor/Counter.java

@@ -0,0 +1,28 @@
+/**
+ * Copyright (C) 2009-2011 Typesafe Inc. <http://www.typesafe.com>
+ */
+
+package akka.docs.transactor;
+
+//#class
+import akka.transactor.*;
+import scala.concurrent.stm.*;
+
+public class Counter extends UntypedTransactor {
+    Ref<Integer> count = Stm.ref(0);
+
+    public void atomically(InTxn txn, Object message) {
+        if (message instanceof Increment) {
+            Integer newValue = count.get(txn) + 1;
+            count.set(newValue, txn);
+        }
+    }
+
+    @Override public boolean normally(Object message) {
+        if ("GetCount".equals(message)) {
+            getSender().tell(count.single().get());
+            return true;
+        } else return false;
+    }
+}
+//#class