Document replacement of "iris.fileformats.ff" and "iris.experimental.fieldsfile".#2850

Merged

pelson merged 2 commits intoSciTools:masterfrom

pp-mo:ff_and_pp_changes

Oct 26, 2017

Commits on Oct 24, 2017

Code conversion notes for lost experimental function.
pp-mo
committed
Also improve docs for fileformats.um and whatsnew for removal of experimental.fieldsfile.
pp-mo
committed