man: generate manpages with help2man

Signed-off-by: Sven Nierlein <Sven.Nierlein@consol.de>
moved doxygen documentation to website

All api docs have been moved to the website. So we don't have
to generate them anymore.

Signed-off-by: Sven Nierlein <Sven.Nierlein@consol.de>