This commit converts the paths provided by the user with the
command line to absolute paths. The effected arguments are:
* --root
* --target-dir
* --bundle-dir
This supersedes and fixes#271
There are more places where this cleanup from %x format
attributes to the format() method is required. Here it is
done in the scope of the image resize task
Only resize the disk format if the raw disk has been changed
If the size of the raw disk is the same as the requested size
just print a message to the user
