Adding MOCSOLVER_SweepMG_PGI routine to openacc.  Other mods were made to fspSolver, IO, and PGIutils in support of this.  I have no confidence that this is right, but it runs.
Added commented out WRITE statement in the validation routine
Initializing a bunch of values to 0.0.  GNU did this anyways, but PGI didn't which caused error in one of the sweepers.