Should allow the processing of really big files.

Just reading through, checking dependency readmes, and turns out zlib (which does not come up with search on npm), is now deprecated as mentioned here. Functionality has been folded into Node core.

This brings up another topic: how to migrate to new Node versions? I think a lot of bionode is from the "v0.12 era"? I've been using the LTS Node 4 for web projects currently. But the new versions bring in some really sweet ES6 features, and I think bionode is less susceptible to "complex environments that find it cumbersome to continually upgrade" [1] and so should be OK to use the latest stable release. But I guess also, should try to stick to LTS as long as the stable features aren't super worth it. I heard that they are trying to match up v6 with V8 5.x or so for something like 95% ES6 support, so thats something nice to look out for.

Currently outputting an array of objects. Maybe JSON would be better?

Having the sequence type determined in the output is useful for converting to other formats that require it, but maybe they should have the dependancy and not bionode-fasta?

If sequence type isn't necessary then bionode dependency isn't needed and webpack can be a lot smaller.