waters raw documentation in rainbow package for python

[ethanbass]

Just saw this newish python package with documentation for some formats like Agilent FID (https://rainbow-api.readthedocs.io/en/latest/agilent/ch_fid.html) and Waters .raw (https://rainbow-api.readthedocs.io/en/latest/waters.html) that aren't yet supported in Entab. Thought it might be of use.