Idea : New math function

Dear

I will be greate to :

- add an option on the round math function, by default it is half. But if you need the whole part you cannot. Exemple 5,4 -> 5, 5,8->5 (it is the int() function). (type of rounding : https://en.wikipedia.org/wiki/Rounding)

- add latchtime fonction. instead to use an separate IDC with delay On and Off, an function like this latchtime(input chanel, delay on, delay off), can be greate to simplify the code.

- add hysteresis function, hysteresis(input chanel, switch on if sup, switch off if under).

Regards