Include declarative sizing and coloring CSS in iconfont/material-icons.css

I'm involved in a project that implements very modular approach using webpack and AngularJS. I use your npm package so I can go ahead and depend on Material Design Icons like this:

``` javascript
import 'material-design-icons/iconfont/material-icons.css';
```

which is great but it does not contain declarative CSS rules that your guide suggests [here](http://google.github.io/material-design-icons/#styling-icons-in-material-design). Which means I have to use Sass to globally import it. And that means if I take my component and give it to someone else, the icons will show but all the sizing and coloring will be lost. It either goes against "component way" or I'm missing something very obvious. Feel free to educate me. Thanks in advance!

Read the Material Design styling guide linked in the issue, then inspect iconfont/material-icons.css, the CSS entry point used by the npm import. Done means that importing this file alone provides the documented declarative sizing and coloring rules, without requiring a separate Sass import.

Written by the indexing model from the issue text.