[Boostrap4 beta] Installation instructions for .angular-cli.json #bootstrap4

bootstrap4_1.txt

"styles": [
        "../node_modules/bootstrap/dist/css/bootstrap.min.css",
        "styles.css",
        "forms.css"
      ],
      "scripts": [
        "../node_modules/jquery/dist/jquery.js",
        "../node_modules/popper.js/dist/popper.js",
        "../node_modules/bootstrap/dist/js/bootstrap.js"
      ],