Wrong grid used for iconset FontAwesome
Before you compile icons, the icons are sized in a `grid`. For example 15x14. When compiled to SVG, this grid translates into a viewBox.

So, what I found out is that the viewBoxes for the FontAwesome icon library in your SVG are way bigger than my viewBoxes (mine is compiled manually outside this project, but we basically do the same thing).

Meaning your FontAwesome icons are not compiled from their original grid size, which is `15x14` for the FontAwesome icons. See [here](https://github.com/FortAwesome/Font-Awesome/issues/391#issuecomment-11825441).

Now you are wondering, what does it matter or does it even matter....it does!
Why does it matter, I didn't found out yet, but using the wrong grid size results in icons not being shown completely when applying a `font-size` to it. 

Let me explain / show you.

---

In order to size a SVG-icon with `font-size` (instead of apply an individual width and height to each icon), the following CSS must be applied.

```
svg:not(:root) {
    overflow  : hidden;
    ...
}

svg {
    display        : inline-block;
    fill           : currentColor;
    height         : 1em;
    position       : relative;
    stroke         : currentColor;
    stroke-width   : 0;
    width          : 1em;
}

// From hereon we can size SVG-icons by just applying a
// `font-size` to it, since the width and height is related
// to it by using `em`.
```

Now when I use the CSS above in combination with your SVG-icons (the wrong grid and therefor the viewBoxes), I see some icons not being shown completely. See example below:

![SVG icon](https://s10.postimg.org/6ejtc41y1/example.png)

---

How to fix this? Just apply the correct grid to each icon for each iconset before compiling.
Again, for FontAwesome the original grid size is [`15x14`](https://github.com/FortAwesome/Font-Awesome/issues/391#issuecomment-11825441).
