separate traversal and counting for stats
separate traversal and counting for stats

udo-stenzel/samtools-patched,mpieva/samtools-patched,udo-stenzel/samtools-patched,udo-stenzel/samtools-patched,mpieva/samtools-patched,udo-stenzel/samtools-patched,mpieva/samtools-patched,mpieva/samtools-patched,mpieva/samtools-patched,udo-stenzel/samtools-patched