Adding codes for Polar Bear

[KVinS]

I have added codes for Polar Bear.
However, there are a couple of difficulties:

• The air conditioner does not have a temperature for the drying and ventilation modes - therefore, I simply duplicated the codes.
• There is no "auto" mode in the ventilation mode - I copied the low there
• I forgot that the air conditioner actually works up to 31, but forgot to copy these codes and set the maximum to only 30 >_<

[KVinS]

Ooooops.
I tested this and noticed that the unit doesn't always accept temperature codes. (About 3/4 of the time.) The shutdown code works 1/10 of the time. I did tests and noticed that a different shutdown code is written each time. It seems that either I am making a mistake somewhere or this protocol is complex and not easy to copy.