tweak default asset setup

gulpfile.js

@@ -12,5 +12,5 @@ var elixir = require('laravel-elixir');
  */
 
 elixir(function(mix) {
-    mix.less('app.less');
+    mix.sass('app.scss');
 });

package.json

@@ -2,6 +2,7 @@
   "private": true,
   "devDependencies": {
     "gulp": "^3.8.8",
-    "laravel-elixir": "^2.0.0"
+    "laravel-elixir": "^2.0.0",
+    "bootstrap-sass": "^3.0.0"
   }
 }

resources/assets/less/app.less

-

resources/assets/sass/app.scss

+// @import "node_modules/bootstrap-sass/assets/stylesheets/bootstrap";
+