save _occupied_bins in gzipped CounitingHash writing
save _occupied_bins in gzipped CounitingHash writing

ged-lab/khmer,ged-lab/khmer,F1000Research/khmer,souravsingh/khmer,F1000Research/khmer,souravsingh/khmer,F1000Research/khmer,ged-lab/khmer,souravsingh/khmer