Switch to cmake-build-extension and logic for finding rosco library path

[gbarter]

Description and Purpose

To further simplify the setup.py, instead of rolling our own hack for working with cmake, this switches to a library that is intended to do exactly that while playing nicely with Python. This should help with the conda installs a bit. Also, there is now logic to automatically find the libdison.x library, wherever it might have been installed. No need for every script to do that on its own.

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (non-backwards-compatible fix or feature)
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Documentation update
• Maintenance update
• Other (please describe)

TODO Items General:

• Add example/test for new feature
• Update registry
• Run testing