Adds the Scheduled Images extension.

Includes the Scheduled Images extension extension.
Changed the test_scheduled_images.py
Working unit test test_show_server

in file nova/tests/api/openstack/compute/contrib/test_scheduled_images.py
Cleaned up more tests in test_scheduled_images.py
all unit tests passing except restricted by project
extension unit tests passing
Cleaned up pip errors and Comments
Changed ext to use Tenant name istead of ID
_create_image_schedule includes server_id
API sample tests for OS-SI
working api samples tests
os-services diff brought to master
cleaned up the test_get_server api samples test
add the server's reponses api samples tests

changes the response to return a dict in json, works for json
issue with xml
all tests passing, pep8 cleanup, comments removed
Fixes schedule delete on server delete

when server is deleted schedule is also deleted