* ban all of common & copy numpy_fast
* add numpy_fast
* these are okay
* and ban controls
* better name
* Conversions
* do utils, kalman
* clean up
* sorting
* don't forget
old-commit-hash: 8d961a12e5
* flags
* update ref
* use the flags directly
* use post_init (don't freeze)
* we can maintain frozen with custom class
* not preglobal
* move to common
* cleanup
old-commit-hash: 3a6c3315ab