Adding metaquast as an option if reference data is avaliable

[danejo3]

Metaquast is a quality assessment tool for meta genomics data. Like Quast, we'll want to call metaquast when doing metagenomic assembly.

Metaquast can take in reference data to assist in the final report. If not reference dataset is provided, metaquast will try to identify the genomes in the meta sample using blastn.

All info about how to use metaquast is found here.