Remove mpich2 conflict.

Signed-off-by: Horváth Balázs <q@qroa.ch>
Use xz compression.

Signed-off-by: Horváth Balázs <q@qroa.ch>
Update version.

Signed-off-by: Horváth Balázs <q@qroa.ch>
Remove original-changes.log.

Signed-off-by: Horváth Balázs <q@qroa.ch>