Generalized eig computational routines

Collaboration diagram for Generalized eig computational routines:

Modules
	{he,sy}gst: reduction to standard form
	{he,sy}gs2: reduction to standard form, level 2
	{hp,sp}gst: reduction to standard form, packed
	{hb,sb}gst: reduction to standard form, banded
	pbstf: split Cholesky factor, use with hbgst
	lag2: 2x2 eig

Detailed Description