Branch for 1.5.1

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+Binding Echo Sample Application
+===============================
+This sample demonstrates how to use the new binding extension 
+binding-echo-extension.
+
+The README in the samples directory (the directory above this) provides 
+general instructions about building and running samples. Take a look there 
+first. 
+
+If you just want to run it to see what happens, open a command prompt,
+navigate to this sample directory, and do
+
+ant run 
+
+OR if you don't have ant, on Windows do
+
+java -cp ..\..\lib\tuscany-sca-manifest.jar;..\binding-echo-extension\target\sample-binding-echo-extension.jar;target\sample-binding-echo.jar echo.EchoBindingClient
+
+and on *nix do
+
+java -cp ../../lib/tuscany-sca-manifest.jar:../binding-echo-extension/target/sample-binding-echo-extension.jar:target/sample-binding-echo.jar echo.EchoBindingClient
+
+This looks like a long command. The three things we add to the classpath are
+
+tuscany-sca-manifest.jar           - all of the standard Tuscany SCA runtime and 
+                                     extension classes
+sample-binding-echo-extension.jar  - the new echo binding extension implementation
+sample-binding-echo                - the application that uses the echo binding                         
+
+
+Sample Overview
+---------------
+This sample contains an application (client and server code) that uses
+an SCA binding that simply echoes back any messages that are sent to it. 
+
+binding-echo/
+  src/
+    main/
+      java/
+        echo/
+          Echo.java                     - interface definition for the sample  
+                                          reference and service
+          EchoComponentImpl.java        - sample component implementation with 
+                                          echo binding reference
+          EchoBindingClient.java        - sample client
+      resources/
+        EchoBinding.composite           - the SCA assembly for this sample
+    test/
+      java/ 
+        echo
+          EchoBindingTestCase.java      - sample JUnit test case for the sample 
+                                          client
+  binding-echo.png                      - pictorial representation of the sample 
+                                          .composite file
+  build.xml                             - the Ant build file
+  pom.xml                               - the Maven build file
+  
+
+Building And Running The Sample Using Ant
+-----------------------------------------
+With the binary distribution the sample can be built and run using Ant as 
+follows.
+
+cd binding-echo
+ant compile
+ant run
+
+You should see the following output from the run target.
+
+run:
+     [java] Passing thro invoker...
+     [java] Returned message: foo
+     [java] Echo reference = foo
+     [java] Passing thro invoker...
+     [java] Returned message: bar
+     [java] Echo service = bar
+
+
+Building And Running The Sample Using Maven 
+-------------------------------------------
+With either the binary or source distributions the sample can be built and
+run using Maven as follows. 
+
+cd binding-echo
+mvn
+
+You should see the following output from the test phase.
+
+-------------------------------------------------------
+ T E S T S
+-------------------------------------------------------
+Running echo.EchoBindingTestCase
+Passing thro invoker...
+Returned message: foo
+Passing thro invoker...
+Returned message: bar
+Tests run: 2, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.811 sec
+
+Results :
+
+Tests run: 2, Failures: 0, Errors: 0, Skipped: 0 
+
+This shows that the Junit test cases have run successfully.