Contig and genome level grouping

[cmorganl]

Another feature that should be included is the ability to group sets of contigs, and therefore their abundance values, based on their sample or genomic source.

This can be implemented by providing the following options:

1. sum alignment metrics for all reference sequences in the fasta file
2. allowing users to provide multiple fasta files and sequences are grouped based on what fasta they were found in or
3. read a text file containing group prefixes, where all reference sequences from a group share a single prefix in their header/sequence name.