FIX: MPI_Comm is defined as int in MPICH and Mac MPI, but not openMPI.  if 'int', then FASTQLoader constructors become ambiguous.  changing the order of the parameters so that filename string occurs at a different place for the 2 constructors
FIX: MPI_Comm is defined as int in MPICH and Mac MPI, but not openMPI.  if 'int', then FASTQLoader constructors become ambiguous.  changing the order of the parameters so that filename string occurs at a different place for the 2 constructors

ParBLiSS/kmerind,ParBLiSS/kmerind,ParBLiSS/kmerind,ParBLiSS/kmerind,ParBLiSS/kmerind,ParBLiSS/kmerind