QPID-4924: Added the console Python example.
QPID-4924: Changed release.sh to grab Python examples from new directory

The examples located below the bindings directory are now included in
both the pure Python libraries as well as the Swigged bindings.
QPID-4952: Repackaged the Swig Python bindings as qpid_messagingc

Updated the demos to use this new package.