Add more advanced and remote recipes

docs/examples/bluedot_robot_1.py

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+from bluedot import BlueDot
+from gpiozero import Robot
+from signal import pause
+
+bd = BlueDot()
+robot = Robot(left=(4, 14), right=(17, 18))
+
+def move(pos):
+    if pos.top:
+        robot.forward(pos.distance)
+    elif pos.bottom:
+        robot.backward(pos.distance)
+    elif pos.left:
+        robot.left(pos.distance)
+    elif pos.right:
+        robot.right(pos.distance)
+
+bd.when_pressed = move
+bd.when_moved = move
+bd.when_released = robot.stop
+
+pause()