Add PrimeNG

1. npm install

npm install --save primeng
npm install --save primeui
npm install --save font-awesome

2. Add external font-awesome

3. Add external scripts and styles

...
    {src: 'primeui/primeui-ng-all.min.css', inject: true},
    {src: 'primeui/primeui-ng-all.min.js', inject: true}
...