Enable ES6/ES2015 goodness

 - Remove ES5 parser exception from .eslintrc
 - Configure Karma to use Babel to transpile ES6 sources to ES5,
   because PhantomJS does not support ES6
 - Upgrade es5-shim to es6-shim

.eslintrc

@@ -1,8 +1,5 @@
 {
   "extends": "loopback",
-  "parserOptions": {
-    "ecmaVersion": 5
-  },
   "rules": {
     "max-len": ["error", 100, 4, {
       "ignoreComments": true,

index.js

@@ -8,8 +8,8 @@
  * loopback ~ public api
  */
 
-var loopback = module.exports = require('./lib/loopback');
-var datasourceJuggler = require('loopback-datasource-juggler');
+const loopback = module.exports = require('./lib/loopback');
+const datasourceJuggler = require('loopback-datasource-juggler');
 
 /**
  * Connectors

package.json

@@ -46,9 +46,9 @@
     "ejs": "^2.3.1",
     "express": "^4.14.0",
     "inflection": "^1.6.0",
+    "isemail": "^1.2.0",
     "loopback-connector-remote": "^3.0.0",
     "loopback-datasource-juggler": "^3.0.0",
-    "isemail": "^1.2.0",
     "loopback-phase": "^1.2.0",
     "nodemailer": "^2.5.0",
     "nodemailer-stub-transport": "^1.0.0",
@@ -60,11 +60,12 @@
     "underscore.string": "^3.0.3"
   },
   "devDependencies": {
+    "babel-preset-es2015": "^6.22.0",
+    "babelify": "^7.3.0",
     "browserify": "^13.1.0",
     "chai": "^3.5.0",
     "cookie-parser": "^1.3.4",
     "dirty-chai": "^1.2.2",
-    "es5-shim": "^4.1.0",
     "eslint-config-loopback": "^7.0.1",
     "express-session": "^1.14.0",
     "grunt": "^1.0.1",
@@ -78,6 +79,7 @@
     "karma": "^1.1.2",
     "karma-browserify": "^4.4.2",
     "karma-chrome-launcher": "^1.0.1",
+    "karma-es6-shim": "^1.0.0",
     "karma-firefox-launcher": "^1.0.0",
     "karma-html2js-preprocessor": "^1.0.0",
     "karma-junit-reporter": "~1.0.0",

test/karma.conf.js

@@ -16,11 +16,10 @@ module.exports = function(config) {
     basePath: '../',
 
     // testing framework to use (jasmine/mocha/qunit/...)
-    frameworks: ['mocha', 'browserify'],
+    frameworks: ['es6-shim', 'browserify', 'mocha'],
 
     // list of files / patterns to load in the browser
     files: [
-      'node_modules/es5-shim/es5-shim.js',
       'test/loopback.test.js',
       'test/model.test.js',
       // [rfeng] Browserified common/models/application.js
@@ -63,6 +62,7 @@ module.exports = function(config) {
     // Which plugins to enable
     plugins: [
       'karma-browserify',
+      'karma-es6-shim',
       'karma-mocha',
       'karma-phantomjs-launcher',
       'karma-chrome-launcher',
@@ -104,7 +104,9 @@ module.exports = function(config) {
         'superagent',
         'supertest',
       ],
-      // transform: ['coffeeify'],
+      transform: [
+        ['babelify', {presets: 'es2015'}],
+      ],
       debug: true,
       // noParse: ['jquery'],
       watch: true,