upgrade to wiredep & grunt-bower-install 1.0

I released `wiredep` and `grunt-bower-install` 1.0 over the weekend. Aside from a few configuration details being changed, it also added support for other file types. One of them is .sass/.scss. I added a `// bower:scss` block in  `main.scss`, which will allow users to run something like `bower install --save modular-scale && grunt bowerInstall` to have it injected.

That changes in the Gruntfile are just formatting changes, to avoid this kind of thing:

```js
grunt.initConfig({
  task1: {
  },



  task2: {
  }
});
```

I've tested it, and it all seems to be working well. Any extra eyes on this would be great! If I don't hear back in a couple days, I'll just assume all is well and hit the green button :+1: