[core] Make get_properties return the real current value of properties
[core] Add a method set_property to object

This allow to modify at runtime the value of some properties, for
example to reflect changes in the capacity of the sensor.
On the basis of a private patch of Osama Salah.
[ros/depth] new DepthCamera w/ 32FC1 encoding

Added a new ROS publisher for DepthCamera
which publishes images in 32FC1 format
[builder] Kinect = CompoundSensor

fix no `_classpath` issue
[socket] fix get_local_data using MorseEncoder

TypeError as no `value` member, __str__() do the job.
[pymorse] fix #552 unsafe ayncore.loop + close_all

New safer PollThread avoids conflicts on asyncore.socket_map.
Replace simulator_service.close by asyncore.close_all after thread stops.

Thanks to @BenICE for report and testing !
[modifier] extend core.Object enables service