* Kickstart fk20
* Implement i/fft from ethspecs
* Expand test to different sizes
* Implement toeplizt
* Finish implementing fk20
* Fix roots of unity generation
* Implement fft for g1 values
* Fix fk20 and tests
* Add len assertion in test
* Fix roots computations
* Fix test
* Fix imports
* Fmt
* Docs and format
Daniel Sanchez