Spins method conversion changes
Updated code to check if spins conversion is necessary (spin cartesian components are present) --> now priors can be either spin components (1x, 1y, 1z)(2x, 2y, 2z) or a, tilt and phi.
Updated code to check if spins conversion is necessary (spin cartesian components are present) --> now priors can be either spin components (1x, 1y, 1z)(2x, 2y, 2z) or a, tilt and phi.