Watchdog reset added at 30 secs.  Timer is reset if a radio message arrives.
Merge branch 'master' of https://github.com/AdrianRepRap/WiControl

Conflicts:
	Host-software/Debug/Heating
	Host-software/Debug/src/HeatProfile.d
	Host-software/Debug/src/Heating.d
	Host-software/Debug/src/Line.d
Watchdog timer added.