Build catkin packages out of tree as this is the default of ros and
makes it simple to identify build paths.
Signed-off-by: Stefan Herbrechtsmeier <stefan@herbrechtsmeier.net>
Remove all ${BPN} file entries as catkin packages always use
underlines instead of hyphens.
Signed-off-by: Stefan Herbrechtsmeier <stefan@herbrechtsmeier.net>