Continuing from bionode/bionode-fasta#6

Goals:

• backwards compatibility as much as possible (maybe legacy v0.12.x)
• help engage new members by not being super bleeding edge
• never require transpilation of Node code
• browser code will need to be bundled anyways, so transpilation can be OK for that? (i.e. browserify with -t babelify, or webpack + babel-loader) working examples for browser setup of a module should always be included.
• follow best streams implementation (probably latest, may be reason to break backwards compatibility, but with major bump as per semver)

ES6 Compatibility Table

ES6 use cases, arguments for, examples in bionode:

• todo...