Deformed icon for some SVGs
Hey,
First of all great library.
I'm using your library in my own library, had some weird issues I didn't have in [`webfonts-generator`](https://github.com/sunflowerdeath/webfonts-generator) library **or any svg to font site** (like [icomoon](https://icomoon.io/app)).

This example html produced using their library with option `height: 1000`:
![image](https://cloud.githubusercontent.com/assets/8074452/19511851/c7f6d97a-95f1-11e6-9bcd-2358c7528507.png)

this is [icomoon](https://icomoon.io/app):
![image](https://cloud.githubusercontent.com/assets/8074452/19518075/b81975f0-960d-11e6-9ce3-9aa4214a751c.png)

This is yours:
![image](https://cloud.githubusercontent.com/assets/8074452/19511904/04cbc4aa-95f2-11e6-967c-eacd6cfdde10.png)

Code:
Their - 

``` javascript
var webfontsGenerator = require('webfonts-generator')

webfontsGenerator({
  files: [
    '../library/src/icon/create.svg',
    '../library/src/icon/published.svg',
    '../library/src/icon/modified.svg'
  ],
  dest: 'build2/',
  fontHeight: 1000
}, function(error) {
  if (error) console.log('Fail!', error)
  else console.log('Done!')
})
```

Yours - 

``` javascript
var Fontmin = require('fontmin');

var fontmin = new Fontmin()
    .src('../library/src/icon/*.svg')
    .use(Fontmin.svgs2ttf('font.ttf', {fontName: 'iconfont'}))
    .use(Fontmin.css({
        glyph: true,
        local: true
    }))
    .dest('./build');
fontmin.run();
```

Thanks in advance
#### EDIT:

Here are the svgs:
[http://www.filedropper.com/modified_2](http://www.filedropper.com/modified_2)
[http://www.filedropper.com/published](http://www.filedropper.com/published)
