integrate install and preos support

Signed-off-by: Nico Schottelius <nico@bento.schottelius.org>
allow releases from non-master branch, if the person knows what he does

Signed-off-by: Nico Schottelius <nico@bento.schottelius.org>
Merge branch 'master' into 4.0-pre-not-stable
do not merge, if not coming from the master branch

Signed-off-by: Nico Schottelius <nico@bento.schottelius.org>
Merge branch 'master' into 4.0-pre-not-stable
fix building manpage of __install_partition_msdos

Signed-off-by: Nico Schottelius <nico@bento.schottelius.org>
do not change to the masterbranch...

Signed-off-by: Nico Schottelius <nico@bento.schottelius.org>