Refactor t. conductivity code
Refactor t. conductivity code

Remove all use of ballandspring Hessians.  Compile all inspection functions into a single 'inspect' function to remove the clutter from the main routine.  Remove obsolete functions 'w_to_text' and 'find_indices'.  Move inspect functions towards bottom of file to keep them separated from the main function.  Remove everything related to the characteristic equation because that wasn't well formulated to begin with.

ajkerr0/kappa,ajkerr0/kappa