Save data in TOF to CIF

[jl-wynen]

We need to write the final results in TOF so that analysis software can read them. In the CIF writer, this means changing from saving pd_proc to pr_meas with the appropriate fields.

[jl-wynen]

Currently blocked because we don't have an implementation for converting back to TOF. But this issue needs to be resolved quickly once we have that.

[SimonHeybrock]

Is the wavelength modified after computing it? If not we can just keep the TOF coord when computing wavelength?