Add more advanced and remote recipes

docs/examples/timed_heat_lamp.py

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+from gpiozero import Energenie, TimeOfDay
+from datetime import time
+from signal import pause
+
+lamp = Energenie(1)
+daytime = TimeOfDay(time(8), time(20))
+
+lamp.source = daytime.values
+lamp.source_delay = 60
+
+pause()