Calc/ODFF spreadsheet functions (was: [PUSHED][PATCH] fdo#44456 added calc function DATEDIF as in ODF 1.2)

[Winfried Donkers]

> Just give us a heads-up what you
> would like to pick so we can get into details. If possible we should
> focus on functions defined in the Small/Medium/Large sets of ODFF in
> that order, see
> http://docs.oasis-open.org/office/v1.2/cs01/OpenDocument-v1.2-cs01-
> part2.html#__RefHeading__1018916_7159801101
>
> I think we cover all of Small and most of Medium, only a few missing,
> a double check would be good.