Added an error File when jobs are running

This way the we don't have all of the Fortran 2008 Exact IEEE
garbage being piped to the output files.
Omega Output

The Volume of the cell is now determined in stau_to_tau. However
it's a fake determinant right now and ONLY for Cubic Systems
XES Script Added

The run_xes.pl script was added as well as the xml_tag program. Changes
were also made in major scripts so that the main directory of the XES
program could be passed to the run_xes script