Initial switch to mpi.
Updates/corrections to the MPI calls.
Cleanup of the sweep program. Also removed the gnuplot_script function. The plot scripts should just be kept as separate files.
Added the worst-case split ratio parameter to the mpi program.
Correction to MPI broadcast and corrections to vector population of worst split ratios.
Correction to the wsr loop
Updated how the faceting tolerance is iterated. Also updated the datafile naming.
Updated the test_model program to remove the current geometry from read_cgm. Grumble...
Updates to the number of rays fired in the test and also to the facet tolerance interval control.