Proposal: standardized (subdir) names for 3rdparty/generated code

[C. Boemann]

> filters/words/msword-odf/wv2
> from what I heard this can be considered a fork already.
> but for now I would still treat it as 3rdparty lib,
> until the further fate of this lib has been discussed
> -> filters/words/msword-odf/3rdparty/wv2
it's very much a fork or rather a takeover and will remain so, so please don't 
mark it as 3rdparty and please do reformat it

thanks for your efforts
Camilla