Depend on libguestfs >= 1.18

Otherwise, customization and ICICLE generation on Fedora
17 and 18 will not work.

Signed-off-by: Chris Lalancette <clalancette@gmail.com>
Fix up the unittests to work with python2

Signed-off-by: Chris Lalancette <clalancette@gmail.com>
Release 0.10.0

Signed-off-by: Chris Lalancette <clalancette@gmail.com>
Bump version to next release of Oz

Signed-off-by: Chris Lalancette <clalancette@gmail.com>