Add option to create database of functional assignments

[elsherbini]

I think a useful feature would be to add a database option (or even a csv option) for functional annotation. Each functional annotation would be a row, with a column for its ORF identifier, its genome/sample source, its gene family hit, and its e-value.

I think this feature would be very useful when wrangling with lots of genomes or metagenomic samples. The resulting database would be a lot easier to search than all the fasta files. It would also make it easy to see alternative annotations for the same ORF and the different e-values.

[RNAer]

That's certainly a very useful interfact to have! Thanks for your comment.