Make npm start use --aot and --sourcemaps=false

Author: jelbourn

package.json

@@ -4,7 +4,7 @@
   "license": "MIT",
   "angular-cli": {},
   "scripts": {
-    "start": "npm run build-themes && ng serve",
+    "start": "npm run build-themes && ng serve --aot --sourcemaps=false",
     "lint": "tslint \"src/**/*.ts\"",
     "test": "ng test",
     "pree2e": "webdriver-manager update",