show in image build log when we add mounts to fstab
fix globbing bug
add link to kiwi fstab bug (bnc#900280)
switch to using unpacked containment rpms

Now that the containment rpms contain unpacked isos, there is no need to
worry about mounting them.  Also, we can safely do the probe when adding
the repos, since they will already be in the image at that point.
switch internal links to etherpad
update libvirt dependencies