* Update sensor.mysensors docs, about moving V_IR_SEND type to switch
platform.
* Update switch.mysensors docs. Add section about the new service and
additional example sketch for the IR switch device.
* Add binary sensor page. Move door, motion, smoke, and part of
sprinkler, leak, sound, vibration and moisture sensors to binary
sensor from sensor page.
* Move back S_LIGHT to switch page from light page.
* Specify config defaults and supported protocol
versions.
* Add guide for presenting a sensor.
* Specify supported S_TYPES and V_TYPES for sensors and switches.