adding percent reads stuck at root to bit-gen-kraken2-tax-plots plots

adding min percent parameter to bit-gen-kraken2-tax-plots

adding bit-gen-kraken2-tax-plots

adding bit-gen-reads

updating bit-mutate-seqs

- drastically improving efficiency

bit-rename-fasta-headers fix

version-bump

Update bit-version

updating bit-dl-ncbi-assemblies

- to store ncbi assembly metadata tables and only update if greater than 4 weeks old (#28)

making min coverage default of bit-ez-screen 90 instead of 95