After the image has been uploaded to pithos and registered to cyclades,
prompt the user about saving the uploaded image locally.

This exception can be used by the WizardPage instances to exit the
wizard.

Make the ImageDescription field of the dialog wizard overwrite the
DESCRIPTION image property.

In the cli output classes this method will clear terminal screen if
the standard output is a terminal.

A user can now create and upload an image using the wizard

The system does not perform anything yet when in wizard mode.

Create the new python module to host the aforementioned code.