GitLab

added matrix and vector types
added 3D FFT test

as Devin's interface.

2. Switched ctf.hpp to be templated and instantiated complex and double
3. Made diagonal rescaling work for SY and FFT test passes

TODO: Make diagonal rescaling require less dumb redistributions

Changed sizes from int64_t to int.  SY FFT test gets the wrong answer in parallel however, which is worrying