3DFACE: changes in Doxygen comments.

Signed-off-by: bert <bert.timmerman@xs4all.nl>
3DSOLID: changes in Doxygen comments.

Signed-off-by: bert <bert.timmerman@xs4all.nl>
ACAD_PROXY_ENTITY: changes in Doxygen comments.

Signed-off-by: bert <bert.timmerman@xs4all.nl>