* Add initial eigenvalue example

* Rename example and update description

* Add error calculation with FOM

* Add options for energy fraction and reduced dim

* Update eigenproblem problem setup

* Fix center and kappa for problem 4 and 5

* Fix saving eigenvectors to visit

* Rename example to elliptic eigenvalue

* Update case 4 and 5

* Output initial condition and adjust center relative to mesh

* Add case 6 and use square mesh by default

* Update mesh bounds and mapping

* Add additional case to vary center around point

* Transform mesh to be centered around origin

* Add modified cases for limiting domain

* Refactor parameter mapping used in potential setup

* Update case 9 setup to use absolute mesh location

* Add eigenvector error calculation

* Add timing info printout

* Add option to compile mfem with lapack enabled

* Update takeSample to use new function signature

* Add verbose option for solver

* Renaming mapping helper functions

* Add SuperLU, Strumpack, MKL CPardiso preconditioners

* Add SuperLU build to setup script

* Fix getSpatialBasis calls to remove time parameter

* Move helper functions to utilities

* Fix issues with lapack/superlu setup

* Add sample outputs for example problem

* Fix example sample commands

* Update function docs and fix abs error