*add #ifdef _OPENMP before #pragma
*bug fix of idamax for dsymatrix.
*Enable OpenMP for dssmatrix*dcovector operations.
*row and col functions were added for z* classes.
*row and col functions were added for all d*matrix classes.
*row(const long&) and col(const long&) functions were added for dgematrix.
idamax and damax functions were added for dsymatrix.
*just added some comments.
*some bug fixes for zhsmatrix.
*to_dsymatrix etc. were added.
