saveSvgAsPng
============

To save a PNG, call the `saveSvgAsPng` function with an SVG node, a filename, and an optional scaling factor:

```javascript
saveSvgAsPng(document.getElementById("diagram"), "diagram.png", 3);
```

saveSvgAsPng
============

To save a PNG, include the script `saveSvgAsPng.js` in your page, then call the `saveSvgAsPng` function with an SVG node, a filename, and an optional scaling factor:

```javascript
saveSvgAsPng(document.getElementById("diagram"), "diagram.png", 3);
```

Add instruction on including script.
Add instruction on including script.
