wout/svg.js — pull request #179 by Shtong (2014-05-02 15:26:49+00:00)
Title: Fixed a bug where Element.style() would not save empty values in IE11

Hi,
I noticed a problem with svg.js, which is when the style() method is called to save an empty value in a style property (so it reverts to its default value), the change is not registered by IE11.

A simple test case :
```javascript

Test SVG

```
This works as a test case since ellipse.show() will actually call ellipse.style('display', '')

Note that I did not test the fix in all the browsers supported by svg.js. only with the latest versions of IE, Firefox and Chrome (on Windows of course).