Integer set type

This script initializes an integer set. The constructor accepts an unlimited number of arguments that may either be tuples in the form of (start,stop) where either start or stop may be a number or None to represent maximum minimum in that direction. The range specified by (start,stop) is always inclusive (differing from the builtin range OperaTor). Keyword arguments that can be passed to an integer set are min and max, which specify the minimum and maximum number in the set, respectively. You can also pass None here to represent Minus or plus Infinity, wh pass Nonso the Default.