Create es and commonjs separate build steps

.gitignore

@@ -8,3 +8,7 @@ _book
 *.diff
 examples/__build__
 coverage
+
+## Built folders
+es
+lib

package.json

@@ -3,6 +3,8 @@
   "version": "2.0.0",
   "description": "Accessible modal dialog component for React.JS",
   "main": "./lib/index.js",
+  "module": "./es/index.js",
+  "jsnext:main": "./es/index.js",
   "repository": {
     "type": "git",
     "url": "https://github.com/reactjs/react-modal.git"
@@ -15,19 +17,25 @@
   "scripts": {
     "start": "./node_modules/.bin/webpack-dev-server --inline --host 127.0.0.1 --content-base examples/",
     "test": "cross-env NODE_ENV=test karma start",
-    "lint": "eslint lib/"
+    "lint": "eslint lib/",
+    "clean": "rimraf lib es",
+    "build:commonjs": "cross-env BABEL_ENV=commonjs babel src --out-dir lib",
+    "build:es": "cross-env BABEL_ENV=es babel src --out-dir es",
+    "build": "npm run clean && npm run build:commonjs && npm run build:es"
   },
   "authors": [
     "Ryan Florence"
   ],
   "license": "MIT",
   "devDependencies": {
-    "babel-core": "^6.7.4",
+    "babel-cli": "^6.24.1",
+    "babel-core": "^6.25.0",
     "babel-eslint": "^7.1.1",
     "babel-loader": "^6.2.4",
-    "babel-preset-es2015": "^6.6.0",
-    "babel-preset-react": "^6.5.0",
-    "babel-preset-stage-2": "^6.24.1",
+    "babel-plugin-transform-class-properties": "^6.24.1",
+    "babel-plugin-transform-object-rest-spread": "^6.23.0",
+    "babel-preset-env": "^1.5.2",
+    "babel-preset-react": "^6.24.1",
     "codeclimate-test-reporter": "^0.4.0",
     "coveralls": "^2.13.1",
     "cross-env": "^5.0.1",
@@ -55,7 +63,7 @@
     "react-addons-test-utils": "^15.0.0",
     "react-dom": "^15.0.0",
     "rf-release": "0.4.0",
-    "rimraf": "^2.5.4",
+    "rimraf": "^2.6.1",
     "sinon": "next",
     "uglify-js": "2.4.24",
     "webpack": "^1.12.14",