Intro
  =====
  
  `base64-js` does basic base64 encoding/decoding in pure JS. Many browsers already have this functionality, but it is for text data, not all-purpose binary data.
  
  Sometimes encoding/decoding binary data in the browser is useful, and that is what this module does.
  
  API
  ===
  
  `base64-js` has two exposed functions, `toByteArray` and `fromByteArray`, which both take a single argument.
  
  * toByteArray- Takes a base64 string and returns a byte array
  * fromByteArray- Takes a byte array and returns a base64 string