[core] reorganize __del__

object.__del__ was stealing call from abstractobject.__del__
sensors and actuators now explicitly clean their output/input functions
[doc] Updated RELEASE_NOTES for 1.0-beta1
[pymorse] Moved pymorse into its own module.

This should have 0 impact on the way pymorse is used in scripts
[pymorse] Fix previous commit (testing was done on a wrong file)

While here, minor fix in the pymorse doc.
[pocolibs] Guarantee camera order in viam poster
[core] Another try to release properly ressources
[pocolibs] Improve a bit logging
[pocolibs] Release properly ressource for viam
[core] Release ressource handlded by overlays
[builder] Fix entries for different level of odometry
[ros] allow classes outside morse package
[env] clean MULTITEXTURE mode for camera testing
[builder] add docstring from builder.rst
[doc] merge builder and builder_example
[doc] add missing images :)
[pocolibs] Fix pose computation for images

If there are some different frequencies on stereo and video_camera, it
is possible that the robot position when the shots are taken is not the
same than the one when we output data. So store properly the robot
position in camera_video, and use it to compute the transformation for
viam output.

While here, fix an odd rotation paramter.
[builder] Expose service thought socket for pr2 if asked
[testing] Fix the test, from a syntaxic point of view

Now, we get a chance to test something useful :)
[actuator] Make the return type of get_IK_min_max consistent

Use the same kind of return in both prismatic and rotation joint.
It fixes an issue in the call of translate, catched by the
pr2/torso-sockets test
[travis] time install