Refactor for different storageobject summaries
Refactor for different storageobject summaries

Subclass UIStorageObject. Override summary(). Having Storageobject be
used for all so types was getting too ugly.

Also, clean up hackery in bytes_to_human.

Signed-off-by: Andy Grover <b7d524d2f5cc5aebadb6b92b08d3ab26911cde33@redhat.com>

cloud4life/targetcli-fb,cvubrugier/targetcli-fb,agrover/targetcli-fb