Docs updates: add installing, advanced recipes, remote gpio and remote recipes - wip

docs/examples/led_button_remote_1.py

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+from gpiozero import LED
+from gpiozero.pins.pigpio import PiGPIOPin
+from signal import pause
+
+button = Button(2)
+led = LED(PiGPIOPin(17, host='192.168.1.3'))
+
+led.source = button.values
+
+pause()

docs/examples/led_button_remote_2.py

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+from gpiozero import LED
+from gpiozero.pins.pigpio import PiGPIOPin
+from gpiozero.tools import all_values
+from signal import pause
+
+led = LED(17)
+button_1 = Button(PiGPIOPin(17, host='192.168.1.3'))
+button_2 = Button(PiGPIOPin(17, host='192.168.1.4'))
+
+led.source = all_values(button_1.values, button_2.values)
+
+pause()

docs/examples/led_remote_1.py

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+from gpiozero import LED
+from gpiozero.pins.pigpio import PiGPIOPin
+from time import sleep
+
+led = LED(PiGPIOPin(17, host='192.168.1.3'))
+
+while True:
+    led.on()
+    sleep(1)
+    led.off()
+    sleep(1)

docs/examples/led_remote_2.py

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+from gpiozero import LED
+from gpiozero.pins.pigpio import PiGPIOPin
+from time import sleep
+
+led_1 = LED(PiGPIOPin(17, host='192.168.1.3'))
+led_2 = LED(PiGPIOPin(17, host='192.168.1.4'))
+
+while True:
+    led_1.on()
+    led_2.off()
+    sleep(1)
+    led_1.off()
+    led_2.on()
+    sleep(1)

docs/examples/led_remote_3.py

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+from gpiozero import LED
+from gpiozero.pins.pigpio import PiGPIOPin
+from time import sleep
+
+led_1 = LED(17)  # local pin
+led_2 = LED(PiGPIOPin(17, host='192.168.1.3'))  # remote pin
+
+while True:
+    led_1.on()
+    led_2.off()
+    sleep(1)
+    led_1.off()
+    led_2.on()
+    sleep(1)

docs/examples/led_remote_4.py

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+from gpiozero import LED
+from gpiozero.pins.rpigpio import RPiGPIOPin
+from time import sleep
+
+led_1 = LED(RPiGPIOPin(17))  # local pin
+led_2 = LED(17)  # remote pin
+
+while True:
+    led_1.on()
+    led_2.off()
+    sleep(1)
+    led_1.off()
+    led_2.on()
+    sleep(1)

docs/examples/led_remote_5.py

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+from gpiozero import LED
+from gpiozero.pins.pigpio import PiGPIOPin
+from time import sleep
+
+led_1 = LED(17)  # local pin
+led_2 = LED(PiGPIOPin(17, host='192.168.1.3'))  # remote pin on one pi
+led_3 = LED(PiGPIOPin(17, host='192.168.1.4'))  # remote pin on another pi
+
+while True:
+    led_1.on()
+    led_2.off()
+    led_3.on()
+    sleep(1)
+    led_1.off()
+    led_2.on()
+    led_3.off()
+    sleep(1)

docs/examples/multi_room_doorbell.py

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+from gpiozero import Buzzer, Button
+from gpiozero.pins.pigpio import PiGPIOPin
+from signal import pause
+
+ips = ['192.168.1.3', '192.168.1.4', '192.168.1.5', '192.168.1.6']
+remote_pins = [PiGPIOPin(17, host=ip) for ip in ips]
+
+button = Button(17)  # button on this pi
+buzzers = [Buzzer(pin) for pin in remote_pins]  # buzzers on remote pins
+
+for buzzer in buzzers:
+    buzzer.source = button.values
+
+pause()

docs/examples/multi_room_motion_alert.py

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+from gpiozero import LEDBoard, MotionSensor
+from gpiozero.pins.pigpio import PiGPIOPin
+from signal import pause
+
+ips = ['192.168.1.3', '192.168.1.4', '192.168.1.5', '192.168.1.6']
+remote_pins = [PiGPIOPin(17, host=ip) for ip in ips]
+
+leds = LEDBoard(2, 3, 4, 5)  # leds on this pi
+sensors = [MotionSensor(pin) for pin in remote_pins]  # motion sensors on other pis
+
+for led, sensor in zip(leds, sensors):
+    led.source = sensor.values
+
+pause()

docs/examples/traffichat_remote_1.py

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+import gpiozero
+from gpiozero import TrafficHat
+from gpiozero.pins.pigpio import PiGPIOFactory
+from time import sleep
+
+gpiozero.Device._set_pin_factory(PiGPIOFactory(host='192.168.1.3'))
+th = TrafficHat()  # traffic hat on 192.168.1.3 using remote pins

docs/examples/traffichat_remote_2.py

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+import gpiozero
+from gpiozero import TrafficHat
+from gpiozero.pins.pigpio import PiGPIOFactory
+from time import sleep
+
+th_1 = TrafficHat()  # traffic hat using local pins
+gpiozero.Device._set_pin_factory(PiGPIOFactory(host='192.168.1.3'))
+th_2 = TrafficHat()  # traffic hat on 192.168.1.3 using remote pins