CPPLapack Code

*alias and unalias functions were added for vector classes.
(not yet for matrix classes)

*bug fix on dsymatrix::set function. Thanks, Hui Li!!
*change the return object type of zero,initialize,and set functions
to enable quick initialization like ...
const dgematrix A(dgematrix(3,3).zero().set(1,1,x));

*change some CPPL_DEBUG lines to CPPL_VERBOSE lines.

*add cap to dcovector and drovector for frexable stretching

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.