Fix indentation for sed plugin
Fix #107. Rename before and after task properties
`before' becomes `successors' and `after' becomes `predecessors'
Fix #104. Remove "enabled" from plugin manifests
Remove tarball flag from default vbox manifest
Simplify sed_i by using fileinput module
This also fixes the problem with the owner:group being set to root
Fix DisableGetTTYs task to disable tty6 as well
Rename expand-volume script to expand-root
Also move task for adjustment of that script into common.
It still needs some modifications to support device names other than xvda
Remove qcow2 from supported vbox volume backings
We can handle raw and vdi images right now
Restrict supported volume backings in prebootstrap