Add auto threshold in ui

[GuilloOme]

Added 4 thresholds in auto mode:

• Cooler : keep temp between 10°c and 70°c
• Cool : keep temp between 20°c and 80°c
• Normal : keep temp between 30°c and 90°c
• Hot : keep temp between 40°c and 100°c

There is not fancy algorithm. this a plain linear calculus…

Also, push the sleep to 1 sec instead of .5 millisec making the process lighter on the load.

[GuilloOme]

Anyone to take a look to this pull request, please ?

[jiping-s]

Sorry, please just fork it, as I don't have time to continue the project this year.

I could put your link here if you update the pic on README.md accordingly, since it's different?

[GuilloOme]

after 6 month of test, it seems that my code is not this stable (the auto feature I introduce some time just hang)… I decline the pull-request.