Add commands examples for copy and delete
Add commands examples for copy and delete

There are no examples for copy and delete command. For beginners,
they may not use both commands. Therefore, I add examples, then
beginners are able to understand how to use both commands.

Change-Id: Id702dc3f9ab903c1c1183c1e229dc6ebedaac0a7

sohonetlabs/python-swiftclient,sohonetlabs/python-swiftclient,openstack/python-swiftclient,openstack/python-swiftclient