Fix#18, fix#28
* Add support for fan domain
* Fix fan status string when speeds are not numeric
* Add support for input_select domain
* Fan and input_select domains will change the max, min, and scale if all of their options (or speeds) are numeric
* Perform numeric check less often
* Remove numeric mode in favor of cleaner logic
* Change some one-liners to arrow functions
* Fix bug on getter for string based option lists
* Update README.md
As i'm trying to modify this element to my own liking, I found this </span> that seems to be without any opening "partner". Btw, what i'm trying to achieve is to have the inline slider moved to the right by removing the toggle, and allowing for longer entity names.
