WOMBAT Example 12

Illustrates use of WOMBAT for standalone matrix inversion, invoked
by --inv filename (or --invxxx where xxx is a placeholder for other letters).

NB: This is a standalone option which does not use a *.par file -- see
screen log (file typescript in subdirectories) for options used!

A: Default - inversion of a full-stored symmetric  matrix using LAPACK routines

A1: As A, but using packed storage via option --invlapf

B: As A but calculating the  sparse matrix inverse subset only using --invspa

C: Eigen-decomposition and generalised inverse of a non-positive definite
   matrix via option --inveig

See Example21/A1 for an illustration of the use of option --hdiag to invert
   a matrix stored in a *.gin file and write out the inverse elements only


