Also MacOSX ReadMe files. Note that a few lib/doc files are
also "updated" because trailing spaces are removed, but their file
formats are the same because they were recently updated at 83672113.
I did "git checkout LFUNs.lyx" because this file is generated
automatically and has a special header.
- add a mandatory argument
- remove an optional argument that compiles, but would break the layout of the output completely (is also not documented nor explicitly defined)
- also add a safe guard for the lyx2lyx conversion routines
