The package is buggy and we can use pbs to do the same thing.

This is needed to suppress the StopIteration exception

Not workable. Kamaki is not imported yet.

This fixes cases where a normal user tries to execute the program and
the program raises pbs.CommandNotFound exceptions because it tries to
import a command from sbin, which is not in the path.

Hooray! This is the first release that actually works!

This is done checking an Ubuntu image for the presence of
kubuntu-desktop package.

* Add foreach_file function in OSBase. This is used by all cleanup
  methods
* Add slackware class. This class derives from linux and overwrites the
  log cleanup behaviour. This is needed since slackware stores all
  package management info in /var/log/packages
* Add a shrink method in DiskDevice. This method shrinks the last
  filesystem to the minimum size
* Make the code style comply with pep8

Make the cow file sparse
Add method in Device to list the partitions
Add a "is bootable" flag in Device constructor