fix bug in ThreeWayValveMotor.mo: the ctrl input was interverted between port_a1 and port_a2. Add examples or update them. Add unit tests.
remove obsolete examples.
Merge remote-tracking branch 'openideas/issue33_BugInValve' into Annex60

Conflicts:
	IDEAS/Fluid/Valves/Examples/HydraulicCircuit.mo
	IDEAS/Fluid/Valves/Examples/Thermostatic3WayValveExample.mo
	IDEAS/Fluid/Valves/Examples/ThreeWayValveMotor.mo
	IDEAS/Fluid/Valves/Examples/package.order
	IDEAS/Fluid/Valves/Thermostatic3WayValve.mo
corrected merge error