BioSeq : simple string manipulation and calculations for lazy biologists

In this age when most folks are quicker to a browser omnibar than a terminal, BioSeq aims to complete simple tasks for lazy biologists without having to find utilities on some guy's university website from 1998. This is my first project / contribution on github or otherwise, so let me know if I've done it wrong. 

For example, is a help function atypical for this kind of module?

The Goodie Overview's link to the Metadata readme is broken, so I just imitated what was in another package. It runs in `duckpan query`, so it should be good.