Feature : add option to ps-eval to compute the probabilities of a hand against multiple random hands

[Andres-Briones]

Hi ! Thank you for your program, it's very nice ! I'm trying to get the ranking of hand against different number of random opponents. Would it be possible to add a feature to perform this calculation ?

From the rankings, I would then be able to compute the percentiles and get the ranges as is https://www.pokerhandrange.com/.