QPID-4924: Fixed the Python examples to use the new Python module

Now the imports will first attempt to bring in qpid_messaging, the Swig
generated Python. If that fails it will then fall back to trying to
import qpid.messaging, the pure Python binding.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1524572 13f79535-47bb-0310-9956-ffa450edef68
QPID-4924: Created the console Python example app.

It allows the user to send messages tot he server example app and get
messages back.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1524573 13f79535-47bb-0310-9956-ffa450edef68
QPID-4924: Move the Python examples under the bindings directory.

They now are found with the other languages.

git-svn-id: https://svn.apache.org/repos/asf/qpid/trunk@1524574 13f79535-47bb-0310-9956-ffa450edef68