verify_ckc no longer works

Hello there,

I understand most components of the FairPlay Streaming Server SDK haven't been updated in about a decade, but the verify_ckc tool no longer works, and it's really helpful. It throws errors when trying to import the Crypto library...probably something to do with this whole Python 2 vs Python 3 thing.

I don't know anything about Python or I'd try to fix it myself but...I'm just bringing this up in case anyone from the FairPlay team reads these things!

Thx