take name/extension of image to contain from rpm macros
take dest dir of image to contain from rpm macros
fix %description
depend on new containment-rpm-config approach
eliminate superfluous attempt to untar an .iso
handle OBS builds
introduce prefix/suffix scheme
fix setup of fstab
add caution that %post doesn't actually work
remove needless echo
append to fstab, don't truncate it!!
remove erroneous trailing quote
add link to kiwi .iso naming bug (bnc#900109)
use %containment_image_description macro
switch to making the rpm contain the unpacked .iso contents

This *might* make the appliance a fraction more efficient in terms of
storage (no compressed image nested in another compressed image) and
performance (no need to go through the loopback device).

It will also allow us to modify the repository, which seems to be
required since at this stage of the image build.  This is because the
.iso provided doesn't have a proper signature in content.key, because
the BS bs_signer backend service run asynchronously so hasn't yet signed
the .iso.  Consequently we'll have to ensure a valid signature
ourselves.
add a fake product key

At the kiwi_post_run stage of the image build, the .iso provided doesn't
yet have a proper signature in content.key, because the BS bs_signer
backend service run asynchronously so hasn't yet signed the .iso.
Consequently we'll have to ensure a valid signature ourselves.  For now
we'll just disable key-checking, so it's good enough to have any key as
long as it's the right format to keep "zypper refresh" happy.