TODO.md

• at some point, stop using the __None=None anti-pattern. more language features would make it easy.
• fix current hack for converting hybrid literals to strings
• fill out multiplex
• better branch selection for lambert w and others
• fill out remaining hybrid and hybrid literal trig functions
• rectify imaginary measure with hyperplex better, for pow and such
• HybridVector
• think about either:
  • use individual real and antiox types to distiguish things like sqrt(Real(-1)) = i vs. sqrt(-1) = nan,
  • keep going with distinguishing function names like hsqrt(-1), hexp(), etc..