Fixed an error when trying to save homeostats using sockets. Sockets cannot be pickled. Pop up a warning instead
edited all setups for Webots experiments to inform the homeostat they use sockets
Replaced the plotting of the vehicle's trajectory through gnuplot's manual operation
with a matplotlib widget operated from a button in the main interface

 Changes to be committed:
	modified:   src/Simulator/HomeoGeneralGUI.py
	modified:   src/Simulator/HomeoQtSimulation.py
	modified:   src/Webots/Homeo-experiments/controllers/supervisorTrajectory/supervisorTrajectory.py