Belos: Add condition number estimation to GMRES
Created by: mhoemmen
@drnoble requests that we add condition number estimation to GMRES.
Motivation and Context
@drnoble wants this feature for scaling studies. CG already has this feature (thanks to @csiefer2 :-) ). AztecOO's GMRES does too.
It may be possible to do this with a custom StatusTest. The StatusTest would have access to the iteration object, which in turn has access to GMRES' upper Hessenberg matrix (actually matrices, since we're talking about