remove postcss and recast for now - only runtime polyfills

Author: jonathanong

.travis.yml

@@ -1,6 +1,6 @@
 node_js:
-- "0.10"
-- "0.11"
+- "iojs"
+sudo: false
 language: node_js
 script: "npm run-script test-travis"
 before_install: "npm update -g npm"

lib/feature.js

@@ -1,12 +1,7 @@
+'use strict'
 
-// to do:
-// https://github.com/medikoo/es6-symbol
-// https://github.com/tvcutsem/harmony-reflect
-// function.create?
-// string.prototype.at?
-
-var inherits = require('util').inherits
-var Feature = require('./feature')
+const Feature = require('polyfills-feature')
+const inherits = require('util').inherits
 
 module.exports = Polyfill
 
@@ -25,7 +20,7 @@ function Polyfill(options) {
 Polyfill.polyfills = []
 Polyfill.polyfill = {}
 Polyfill.register = function (obj) {
-  var polyfill = new Polyfill(obj)
+  const polyfill = new Polyfill(obj)
   Polyfill.polyfill[obj.name] =
   Polyfill.polyfill[obj.shortName] = polyfill
   Polyfill.polyfills.push(polyfill)