Rename DiskDevice class to Image and move it to a seperate module.
Also, don't let the user access the os_type/* modules directly. In
Image class create the `os' member variable that will host an
appropriate instance of one of the OSBase classes.

Variable d in function valideate_account was undefined

The exclude patterns were wrong and they excluded more files than
they should.

In the bundled image /tmp and /var/tmp file mode bits ended up being
wrong.

Display the online documentation url

Support images that can only be deployed by the user that registers
the image to cyclades

You don't need the account name. You can fetch it from astakos using
the authentication token.

Credits go to Konstantinos Tompoulidis <kostikas@grnet.gr>

Latest versions of synnefo require user id instead of e-mail to
authenticate.

Don't let libguestfs guess the format of the provided image. Enforce
it to treat the image as raw.

When shrinking partitions, make sure that the shrinked partitions
always starts from the sector the initial partition started. Changing
this may destroy the boot loader.

It behaves different in different pyparted versions and only causes
problems. Let python do the garbage-collection...

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.

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

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.

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.