Add the new powerbtn_action sysprep command that controls the action
made when the power button gets pressed.

Workaround the bug that libguestfs may raise a RuntimeError even if the
command runs successfully, due to the fact that the command exited with
non-zero exit status.

Initialize the output modules in the beginning. Let the output instance
print the error message if a Fatal Error occurs.

If --syslog option is passed to snf-mkimage or snf-image-creator, the
program will log its output to syslog too.

This resolves #42

This is only needed for the info method. There is no reason to pollute
the rest of the methods with this.

It is better to create warnings that RuntimeError exceptions.

Make sure to check all the file paths before opening files to collect
metadata. The metadata collecting process takes place in the beginning
and the user cannot control it. Warn if something is missing but do not
throw exceptions

By default add a 10 second boot menu timeout. The user may change
this by altering the bootmenu_timeout sysprep parameter. This works
for GRUB1, GRUB2 and syslinux.

This resolves #41

The function would raise an exception if the value was not a list

Extend the use-persistent-block-device-names sysprep to include support
for the syslinux configuration file (/boot/syslinux.cfg).

This resolves #40

Make sure that the libguestfs appliance is always launched directly
using qemu. This can be done by exporting the environment variable
LIBGUESTFS_BACKEND=direct before importing the guestfs library.

This fixes #38

Convert all user defined metadata names to uppercase before locally
saving them to the metadata dictionary. The metadata names are case
insensitive and by converting them to uppercase we can ensure that at
any moment only one instance of them is present in the dictionary.

This fixes #39

Create a warning instead.

This resolves #36

Add a sysprep for disabling the IPv6 privacy extensions in Linux

This resolves #37

Bump version to 0.8.1next

Bump version to 0.8next

Mark them as unsupported but allow the user to upload and register
them.

Use stderr insteam of stream

In the Debian instructions use wget which is by default installed in
the Base system.

 * Fix obsolete license and url info
 * Add missing entries

Add indent=4 in the json dump execution

This displays the registration info as returned by ./kamaki and gives
the user the option to save it in a file.

bsd.py already contains it.

By default the output goes to sys.stdout. This is used in snf-mkimage
to output the plankton answer when registering an image to a synnefo
deployment.

This resolves #21

The base class is named Output. Having a method with the same makes
the code confusing.

Feature bsd support

Add a method that checks if the ssh daemon is enabled at boot.