Rhino8 errors

[filipejsbrandao]

I was not able to run GhFunken on Rhino8 so I ported the code to the new RhinoCode editor and did a couple of changes to comply with python3. I'm not sure if it makes sense to make a pull request, since this has backwards braking changes.

[ar0551]

Hi Felipe, thanks for looking into this, I actually had to do something similary for running PyFunken in Python 3. Let me check how to arrange the development split between Rhino 7 and 8, and I come back to you.