Icon request: The rest of the creative-commons pack
<!-- Please review open and closed issues that the icon hasn't been requested before. -->

## Icon

All of them could be downloaded from these links: [svg](https://mirrors.creativecommons.org/presskit/icons/cc-icons-svg.zip), [eps](https://mirrors.creativecommons.org/presskit/icons/cc-icons-eps.zip), [png](https://mirrors.creativecommons.org/presskit/icons/cc-icons-png.zip).

## Name Suggestion

* `fa-creative-commons-by`
* `fa-creative-commons-nc`
* `fa-creative-commons-nc-eu`
* `fa-creative-commons-nc-jp`
* `fa-creative-commons-sa`
* `fa-creative-commons-nd`
* `fa-creative-commons-zero`
* ...

<!-- What name should be used for this icon? -->



## Use Case

In a combination with the already-existing `fa-creative-commons` to indicate the license of a work.

My example would look like:

```html
<p>This work is licensed under 
  <a href="https://creativecommons.org/licenses/by-sa/4.0/">
    <i class="fa fa-creative-commons"></i> 
    <i class="fa fa-creative-commons-by"></i> 
    <i class="fa fa-creative-commons-sa"></i> 4.0
  </a>.
</p>
```

Using forkaweso.me as an example, it'd look like this:

```html
Documentation is licensed under 
  <a href="http://creativecommons.org/licenses/by/3.0/">
    <i class="fa fa-creative-commons"></i>
    <i class="fa fa-creative-commons-by"></i> 3.0
  </a>
```

Note that font-awesome [supports this use case](https://fontawesome.com/icons?d=gallery&q=creative-commons) in the free version since v5.0, and it's effectively the only thing I'm missing since I've made the switch.