If not then don't output progressbars and colors

All image-creator components now output messages using an instance
of one of the output classes.

The metadata are collected in the constructor and are saved in the
meta variable. This way they can be accessed and altered by the
sysprep methods. There are cases where some metadata are not valid
and need to be updated after a sysprep action is performed. For
example, remove_user_accounts sysprep action may remove a user that
is present in the USERS metadata.

The metadata passed by the user will overwrite any automatically
collected metadata with the same key.

If the swap partition is the last partition in the media, then it can
be safely removed. The image-creator will save enough info in the
SWAP metadata to recreate it.

This is needed because otherwise setup.py fails on some systems. Also
do some more cleanup.

Also rearrange input options

Also merge data_cleanup tasks with syspreps and did a major cleanup

Add --print-data-cleanup and --print sysprep input options. If enabled
the program will output what data cleanup and syspep operations will
and won't run a a selected input media

All printing had to be reordered and now it is done from a central point.

All modules should use image_creator.FatalError exception to report
fatal errors.

This is used to prepare the media for image extraction. The main
difference from data_cleanup is that the tasks performed with this
method are mandatory in order to make the image workable.

Added the following sysprep methods for linux:
 * sysprep_acpid
 * sysprep_persistent_net_rules
 * sysprep_persistend_devs

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

Not workable. Kamaki is not imported yet.

Hooray! This is the first release that actually works!

* 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