bower: devDependencies to allow development

bower.json

@@ -25,5 +25,10 @@
   ],
   "dependencies": {
     "amber": "*"
+  },
+  "devDependencies": {
+    "amber-ide-starter-dialog": "^0.1.0",
+    "amber-contrib-legacy": "^0.2.0",
+    "helios": ">=0.4.3"
   }
 }