Import of lighting from MS Office for extruded shapes

[Regina Henschel]

Hi all,

I have finished my patch in 
https://gerrit.libreoffice.org/c/core/+/164510, including some unit 
tests. It would be nice if someone has some time to review it. If you 
will do it, please add you their or notify my here. If no one wants to 
look at it, I'll commit it as it is.

Kind regards,
Regina