Use std::max and std::min instead of custom macros

[Raincode]

Hello,

since this library uses C++, is there a specific reason not to use std::max and std::min, which IMHO are superior to defining custom macros:

#define MAX(a,b) (((a)>(b))?(a):(b))
#define MIN(a,b) (((a)<(b))?(a):(b))

Just a small suggestion I stumbled upon spontaneously :)

[idea4good]

I love STD, but some MCU IDE do not support STD, or STD would make bin file much bigger.