CPPLapack Code

dssmatrix was renamed to dgsmatrix.
(zgsmatrix is under construction.)

modification to get rid of forbidden codes
*added nullify function for all smart-temporary classes
*put nullify() at the end of shallow_copy functions and shallow copy constructors
*modified destroy function to assign NULL to all pointers

added dssmatrix::stretch function

small modification of dssmatrix functions

Row and Col were added in dssmatrix for faster search of (i,j) component

add "void unique()" for dssmatrix
a few tiny modifitation on dssmatrix

The trunk cpplapack source code was added.