[builder] Make armature morseable by default

Fix #517
[data] Slightly adjustement for 2.70a

Some boxes seems to move a bit in 2.70a, so lower them from a few
centimeter. Fix laser and camera unit-test for 2.70a
[builder] Generate only useful config in multinode situation

In multinode situation, we do not want to create streams and other stuff
for robot simulated on other node. In some case, the initialisation of
streams and co have some unwanted side effects...

It should fix issue reported by Simon in private mails
[bin/morse.in] Blender 2.70a seems ok for blender
[actuator] Introduce ArUco Marker

The ArUco marker is an AR-Marker that allows to compute the camera pose
from images in the ‘real world’.
The purpose of this actuator is to provide a virtual instance of such a
marker in MORSE. By adding an ArUco marker to a MORSE simulation, you can
subsequently stream/export a (virtual) camera image and eventually use
an AR Marker without a physical camera setup or, i.e, test algorithms or
simulate visual servoring.
[doc] Document the addition of arucomarker
Fixed Morsy collision bounds

Reported by Omar Adair Islas Ramírez
Update collision bounds in the robot template

Follow-up of commit 10f7b41c9cc9
test