Example program for dhseqr

This example computes all the eigenvalues and the Schur factorization of the upper Hessenberg matrix H, where
H = 0.3500 -0.1160 -0.3886 -0.2942 -0.5140 0.1225 0.1004 0.1126 0.0000 0.6443 -0.1357 -0.0977 0.0000 0.0000 0.4262 0.1632 .  
See also dorghr, which illustrates the use of this routine to compute the Schur factorization of a general matrix.