Update data in parallel thread hence not blocking main HASS thread

[BoOmka]

Closes #14

[h4]

May be it'll be better to update h4/lywsd02 using asyncio?

[BoOmka]

May be it'll be better to update h4/lywsd02 using asyncio?

I tried to go this way first, but found it way more complicated. Firstly, there is a lot of properties with setters which don't pair well with asyncio. The will need to be rewritten. Secondly, bluepy doesn't have any asyncio-friendly realisation, so all we can do is slap loop.run_in_executor here and there. Spawning multiple threads for just one operation seems a bit of overkill.

[h4]

Thank you!