Updated to IDA 7.5 SP3 & Python 3

[gaasedelen]

I updated the code to be Python 2/3 compatible as well as cleaning up a few prints. I tested on IDA 7.5 SP3 (Windows) using both Python 3.6.7 and Python 2.7.18.

I also tested to ensure everything was still working on IDA 7.0 with Python 2.7.18

I did not update the 'easy install' blob/hash in the readme, and tbh I'd suggest cutting it down to a one liner and ditching the hash checks.

Thanks for your work on this project!

EDIT: Oh sorry, I forgot to mention that I only tested this with Virtualenv since I don't use Conda... 😅