Add Numerical Recipes eigenanalysis to algebra module
Add Numerical Recipes eigenanalysis to algebra module

Add the Press et al. Numerical Recipes jacobi() and eigsrt()
routines to algebra_module.f90. Subroutine jacobi() computes
eigenvectors and eigenvalues for a real, symmetric matrix.
Subroutine eigsrt() sorts the eigenvalues and corresponding
eigenvectors by ascending eigenvalue.

mherman09/Hdef,mherman09/Hdef,mherman09/Hdef