49 total bases and gene counts issues

[chienchi]

add Gene count and total bases count function in the package script.

example stats.json output:
/global/cfs/cdirs/m3408/aim2/metagenome/MAGs/output/nmdc_wfmag-11-ht08wa83.2_mags_stats.json

        {
            "bin_name": "bins.27",
            "number_of_contig": 204,
            "completeness": 97.62,
            "contamination": 6.04,
            "total_bases": 6909823,
            "gene_count": 6994,
            "bin_quality": "MQ",
            "num_16s": 0,
            "num_5s": 0,
            "num_23s": 0,
            "num_tRNA": 55,
             ...

[aclum]

Looks good!