1- npm install font-awesome --save
2- npm install --save bootstrap
3- In the angular-cli.json file locate the styles[] array and add font-awesome references directory here, like below:
4- nb:ceci est un exemple pour tester fontawesome  
5- on peut aussi pour les "scripts bootstrap" introduire le chamin de script dans "script"

"apps": [
    {
      "root": "src",
      "outDir": "dist",
      ....
      "styles": [
          "styles.css",
          "./node_modules/bootstrap/dist/css/bootstrap.css",
          "./node_modules/font-awesome/css/font-awesome.css" // -here webpack will automatically build a link css element out of this!?
      ],
      ...
      "scripts":[
          "chemin/vers/bootstrap/dist/js/bootstrap.min.js"
      ]
  }
  ]
],