bump amber-dev to 0.8.2, use require('amber-dev').helpers

Gruntfile.js

@@ -13,7 +13,7 @@ function findAmberPath(options) {
 }
 
 module.exports = function (grunt) {
-    var helpers = require('amber-dev/lib/helpers');
+    var helpers = require('amber-dev').helpers;
 
     // These plugins provide necessary tasks.
     grunt.loadNpmTasks('grunt-execute');

package.json

@@ -24,7 +24,7 @@
     "test": "grunt test"
   },
   "devDependencies": {
-    "amber-dev": "^0.8.0",
+    "amber-dev": "^0.8.2",
     "grunt": "^0.4.5",
     "grunt-contrib-clean": "^0.6.0",
     "grunt-contrib-less": "^1.0.1",