Visualization code.
Heat visualization code.
Visualization code.
Merge branch 'master' of https://github.com/larics/assisi-playground into heat

Conflicts:
	playground/AssisiPlayground.cpp
	playground/AssisiPlayground.h
	playground/AssisiPlaygroundMain.cpp
Corrected data layer display function.
Implemented key interface to control z coordinate of data layer.
Added options to Playground.cfg to control heat and vibration display.
Implemented a PointMesh class that is used by class HeatActuatorMesh.
The PointMesh class provides methods to created 3 types of meshes: ring, circle, and circumference.

CASU peltier is a circumference of 16 points.

Class ExtendedWorld has a first version to save the world state to a file. Currently only heat is saved.

Added an option to file Playground.cfg to specify whether the world state is saved or not.
Fixed some paths in heat test program
Merge remote-tracking branch 'upstream/master' into heat
comment test heat
Merge remote-tracking branch 'upstream/master' into heat
Temperature relative position.
Merge branch 'heat'

Fixed Conflicts:
	robots/Casu.cpp