Emptied Coordinate3D.h:
   only use typedef Geometry::BasicVector3D<int> IndexVector3D;

to replace Coordinate3D<int>

Renounce use of delegating constructors to avoid warnings from pre-C++11.
Improve comments.

Insert new header comment block, remove old one, manually improve file comments (defines / implements), change brief function description to doxygen format, remove some outcommented code