The method has different behaviour in python 2.6 and python 2.7.
In python 2.6, os.path.relpath('/proc', '/) will output '../proc'
where in python 2.7 it will output 'proc'.

Use length instead of getLength() to get the size in sectors of a
device.

 * Add contact info
 * Add info on how to install Arch Linux packages
 * Add limitations section in usage

Credits go to Alex Pyrgiotis <apyrgio@grnet.gr>

We used to exclude mount point from rsync with options like this:

 --exclude mount/point/*

This will copy the directory and leave out all files under it. In
some cases, this causes problems because rsync will fail if it
cannot stat the directory and some mount point will only return
stat info to their owner and not root. Even if this wasn't the
case, we cannot determine the real directory attributes. The stat
syscall will return the attributes associated with the mount
options. It's better to completely exclude those mpoints in rsync
and create them explicitly after the command runs. We make them
inherit the mode and the ownership of their parent directory.

snf-image-creator removed /var/tmp if the directory was empty

Add missing rsync dependency dependency in the install section of
the documentation

 * Add instuctions for installing the software in Ubuntu 12.10
 * Rephrase some parts in install, overview and usage sections

Support both versions (1.2.x and 2.x) of python-sendfile. In
v1.2.x (py-sendfile) the returning value of the sendfile function is a
tuple, where in v2.x (pysendfile) it's a simple integer.

Make them comply with current source tree

If the process takes too long to finish after the stdout fd is
closed, kill it.

The cow file when creating images or the temporary image file when
bundling the host system may be large. Allow the user to overwrite
the directory under which those files get created.

In the "Installation from source" scenario, add python-sendfile to the
list of dependecies that will be installed via apt-get. Else, it would
complain about missing C headers and the user would need to download
python-dev instead.

When cleaning up sensive user data on unix systems, remove .kamakirc
and .kamaki.history too.

Handle correct extended partitions with id 0xf

Make sure the user cannot select a directory as input media

Add options for preserving extended atrributes, hard links, ACLs.

 * Fix a bug where the parent process did not wait on the child
   processes.
 * Make sure that when updating the copy progress bar, at least
   0.1 seconds have passed. This guarantees that we do not experience
   any flickering in the progress bar.

Add a new try_fail_repeat function that wraps cleanup system commands
and retries them if they fail. There are cases where commands like
dmsetup, umount and losetup -d may fail with device is busy. In most
of the cases, sleeping for halve a second and retrying does the job.

In Guestfs you get notifications about progress on some functions like
launch() by registring callback functions. When using guestfs from python,
this is fragile. If the callback functions raises an exception, you end up
with segmentation fault. It is better to completely remove the progress
monitoring from launch().