message: test command for travis
diff: "ng": "ng",
  "start": "ng serve",
  "build": "ng build",
  + "test": "npm run test-core",
  "test-core": "ng test core --watch=false --code-coverage",
  "test-datepicker": "ng test datepicker --watch=false --code-coverage",
  "test-demo": "ng test demo --watch=false --code-coverage",
  