Numeral System Counter

The motivation for this comes from The Big Book of Small Python Projects. This is a riff on #52, Numeral System Counters.

This one is for everyone in a computer science program who's had to convert a hex-code into binary and then into an integer without the help of a handy-dandy converter. If you're looking for something even more advanced, I'd suggest checking out Rapid Table's and their many number conversion tools.