CPPLapack Code

*a few bug fix for copy constructor of smart temporary classes
*some modification of dssmatrix (not yet included in cpplapack.h)

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

The trunk cpplapack source code was added.