The CMake generate_messages function from the genmsg package
detects the installed message generators via files in the
/usr/etc/ros/genmsg directory. Stage the /usr/etc directory
manually as it is not a common path.

Fixed #50

Signed-off-by: Stefan Herbrechtsmeier <stefan@herbrechtsmeier.net>

Signed-off-by: Stefan Herbrechtsmeier <stefan@herbrechtsmeier.net>

Signed-off-by: Stefan Herbrechtsmeier <stefan@herbrechtsmeier.net>

Signed-off-by: Stefan Herbrechtsmeier <stefan@herbrechtsmeier.net>

Add additonal file entries with standard ros paths to fix the following warnings:
WARNING: QA Issue: std-msgs: Files/directories were installed but not shipped
  /usr/share/std_msgs/msg
WARNING: QA Issue: rosconsole: Files/directories were installed but not shipped
  /usr/share/ros/config/rosconsole.config

Signed-off-by: Stefan Herbrechtsmeier <stefan@herbrechtsmeier.net>

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>

Signed-off-by: Stefan Herbrechtsmeier <stefan@herbrechtsmeier.net>

Signed-off-by: Stefan Herbrechtsmeier <stefan@herbrechtsmeier.net>