streams2 and explicit encodings

[ghost]

This patch uses streams2 and makes the encodings explicit instead of implicit like before. You can now use the following encodings (with room for more):

• buffer (the default)
• array
• string
• uint8array

All of these encodings should work in all browsers, even if they don't have support for typed arrays natively since this patch uses the typedarray module for Uint8Array polyfill. browserify's Buffer module natively already uses the same version, so this module will be duped in the file size output so there isn't any extra file size overhead.

var concat = require('concat-stream')
process.stdin
  .pipe(concat({ encoding: 'uint8array' }, function (body) {
    console.log(body instanceof Uint8Array)
    console.log([].slice.call(body))
  }))

$ echo abc | node x.js 
true
[ 97, 98, 99, 10 ]

[ghost]

[max-mapper]

Merging because kitten in christmas sweater

[max-mapper]

FYI I just published 1.4.0 which makes a slight change to the semantics introduced by this commit.

I published this PR as 1.3.0 not realizing it broke backwards compat in the way that default (no encoding set) streams are handled, so 1.4.0 fixes that.

Basically if you don't set an explicit encoding it will try to infer encoding, which is how 1.x concat-stream has worked. I may remove inference altogether in 2.0

4730459