add support for ChangHong KFR-35GW/DHR(W1-H)+2

[ghostist]

this pr works for me.only support Xiaomi IR Remote.I only own this ir device.

[litinoveweedle]

Hello @ghostist , thank you for your contribution. I did quickly checked your codes and I want to ask you to consider one small change. You seems to to using duplicate commands for fan_only (and maybe also for dry?) mode:

    "fan_only": {
      "low": {
        "16": "nEznMylk0mUxmMsms0nIAcTGbTKZAEaAz4CHgISAH4JfgM+Az4AfgB+AH4AfgB+AH4AfgB+FD4CngMeAh4CHgB+AH4AfgB+AH4AfgB+AH4AfgB+AH4AfgB+AH4AfgB+AH4AfgB+AH4AfgB+AH4AfgB+AH4AfgB+AH4AfgB+AH4AfgB+AH5IHgIeBT4DHgMXMJhMA",
        "17": "nEznMylk0mUxmMsms0nIAcTGbTKZAEaAz4CHgISAH4JfgM+Az4AfgB+AH4AfgB+AH4AfgB+FD4CngMeAh4CHgB+AH4AfgB+AH4AfgB+AH4AfgB+AH4AfgB+AH4AfgB+AH4AfgB+AH4AfgB+AH4AfgB+AH4AfgB+AH4AfgB+AH4AfgB+AH5IHgIeBT4DHgMXMJhMA",
        "18": 

This is completely unnecessary as it is possible to provide the command just once and instead of temperature value (i.e. 17) use - as a key. Would you please consider this change? Thank you.