Create xz compressed releases as well

Signed-off-by: Michal Čihař <michal@cihar.com>
Next release will be soonest in 2015

Signed-off-by: Michal Čihař <michal@cihar.com>
Sync template with used spec file

Signed-off-by: Michal Čihař <michal@cihar.com>
Setting version to 0.39