Add --object-name

Add parameter --object-name, which:
1) Sets target object name when upload single file
2) Sets object prefix when upload a directory

Change-Id: Idc4357c3355e66d31c100540b901e70db20b03c3
Closes-Bug: 1012979
Merge "Add --object-name"
Merge branch 'master' of ssh://review.openstack.org:29418/openstack/python-swiftclient