LearnBoost/node-canvas — pull request #293 by phorque (2013-06-14 17:27:28+00:00)
Title: Add a way to write a PDF directly into a file.

The patch add a way to write the resulting PDF directly into a file without having to use the toBuffer method.

```js
new Canvas(witdh, height, "pdf:/tmp/output.pdf");
```

The internal buffer will not be filled anymore.