do not package .swp files (fixes #269)

Signed-off-by: Nico Schottelius <nico@bento.schottelius.org>
bugfixes for issue 161 and FIXME: also check that there is no object ID
when type is singleton?
completed copyright infos ...
add document to describe the flow when installing

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

Signed-off-by: Nico Schottelius <nico@bento.schottelius.org>
Merge branch 'master' into preos
run apt-get clean before creating preos

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